public SymbolCodeEnum Convert(SymbolCodeEnum baseSymbolCode, ExchangeStatsKeyEnum statsKey)
{
string convertedSymbolCode = null;
switch (statsKey)
{
case ExchangeStatsKeyEnum.OpenLongs:
convertedSymbolCode = baseSymbolCode.ToString() + "LONGS";
break;
case ExchangeStatsKeyEnum.OpenShorts:
convertedSymbolCode = baseSymbolCode.ToString() + "SHORTS";
break;
default:
throw new ArgumentException($"Unsupported stats key: {statsKey}");
}
if (convertedSymbolCode == null)
{
throw new ArgumentException($"Unable to convert {baseSymbolCode} {statsKey}");
}
return((SymbolCodeEnum)Enum.Parse(typeof(SymbolCodeEnum), convertedSymbolCode));
}
public Symbol(SymbolCodeEnum code, CurrencyCodeEnum baseCurrencyCode, CurrencyCodeEnum quoteCurrencyCode, bool tradable)
{
Code = code;
BaseCurrencyCode = baseCurrencyCode;
QuoteCurrencyCode = quoteCurrencyCode;
Tradable = tradable;
}
public ISymbol Get(SymbolCodeEnum symbolCode)
{
var matched = Symbols.Where(s => s.Code == symbolCode).FirstOrDefault();
if (matched == null)
{
throw new ArgumentException($"No symbol could be found for symbol '{symbolCode}'");
}
return(matched);
}
public async Task <ICollection <MacdDataPoint> > Macd(ExchangeEnum exchange, SymbolCodeEnum symbolCode, IntervalKey intervalKey, Epoch from, int dataPoints, CandleTypeEnum candleType, int fastEmaPeriod, int slowEmaPeriod, int signalPeriod)
{
var periodOffset = (slowEmaPeriod + signalPeriod) - 2;
var fromOffset = IntervalFactory.GetInterval(intervalKey, from, periodOffset * -1);
var aggValues = await MarketRepository.GetTradeAggregates(exchange, symbolCode, intervalKey, fromOffset.From, periodOffset + dataPoints);
var values = aggValues.GetValues(candleType);
int outBegIdx, outNbElement;
var macdValues = new double[dataPoints];
var signalValues = new double[dataPoints];
var histogramValues = new double[dataPoints];
var retCode = TicTacTec.TA.Library.Core.Macd(0, values.Length - 1, values, fastEmaPeriod, slowEmaPeriod, signalPeriod, out outBegIdx, out outNbElement, macdValues, signalValues, histogramValues);
var validMacdValues = macdValues.Skip(outNbElement - dataPoints).Take(dataPoints).ToArray();
var validSignalValues = signalValues.Skip(outNbElement - dataPoints).Take(dataPoints).ToArray();
var validHistogramValues = histogramValues.Skip(outNbElement - dataPoints).Take(dataPoints).ToArray();
var validAggValues = aggValues.Skip(aggValues.Count - dataPoints).Take(dataPoints).ToArray();
if (retCode == RetCode.Success)
{
var dp = new List <MacdDataPoint>();
for (var i = 0; i < validAggValues.Length; i++)
{
var agg = validAggValues[i];
dp.Add(new MacdDataPoint
{
Epoch = agg.Epoch,
Macd = validMacdValues[i],
Signal = validSignalValues[i],
Histogram = validHistogramValues[i]
});
}
return(dp);
}
throw new Exception("Unable to calculate MACD - " + retCode);
}
public async Task AddSymbol(ExchangeEnum exchange, SymbolCodeEnum symbolCode)
{
using (var context = ContextFactory.CreateDbContext(null))
{
var entity = new ExchangeSymbolEntity
{
ExchangeId = (int)exchange,
SymbolId = (int)symbolCode
};
if (await context.ExchangeSymbol.FindAsync(entity.ExchangeId, entity.SymbolId) == null)
{
await context.ExchangeSymbol.AddAsync(entity);
await context.SaveChangesAsync();
}
}
}
public async Task <ICollection <RsiDataPoint> > Rsi(ExchangeEnum exchange, SymbolCodeEnum symbolCode, IntervalKey intervalKey, Epoch from, int dataPoints, CandleTypeEnum candleType, int rsiPeriod)
{
var fromOffset = IntervalFactory.GetInterval(intervalKey, from, rsiPeriod * -1);
var aggValues = await MarketRepository.GetTradeAggregates(exchange, symbolCode, intervalKey, fromOffset.From, rsiPeriod + dataPoints);
var values = aggValues.GetValues(candleType);
int outBegIdx, outNbElement;
var rsiValues = new double[dataPoints];
var retCode = TicTacTec.TA.Library.Core.Rsi(0, values.Length - 1, values, rsiPeriod, out outBegIdx, out outNbElement, rsiValues);
var validRsiValues = rsiValues.Skip(outNbElement - dataPoints).Take(dataPoints).ToArray();
var validAggValues = aggValues.Skip(aggValues.Count - dataPoints).Take(dataPoints).ToArray();
if (retCode == RetCode.Success)
{
var dp = new List <RsiDataPoint>();
for (var i = 0; i < validAggValues.Length; i++)
{
var agg = validAggValues[i];
dp.Add(new RsiDataPoint
{
Epoch = agg.Epoch,
Rsi = validRsiValues[i]
});
}
return(dp);
}
throw new Exception("Unable to calculate RSI - " + retCode);
}
public async Task <PagedCollection <MarketTrade> > GetTrades(ExchangeEnum exchange, SymbolCodeEnum symbolCode, Epoch from, Epoch to, int?pageSize, int?pageNumber)
{
using (var context = ContextFactory.CreateDbContext(null))
{
var query =
from
t
in
context.ExchangeTrade
where
t.ExchangeId == (int)exchange &&
t.SymbolId == (int)symbolCode &&
t.Timestamp >= @from.TimestampMilliseconds &&
t.Timestamp <= to.TimestampMilliseconds
select new
{
Exchange = exchange,
SymbolCode = symbolCode,
Timestamp = t.Timestamp,
TradeId = t.TradeId,
Side = t.OrderSideId.HasValue ? (OrderSideEnum)t.OrderSideId : (OrderSideEnum?)null,
Price = t.Price,
Volume = t.Volume
};
var totalCount = 0;
if (pageSize.HasValue)
{
totalCount = await query.CountAsync();
query = query.Skip(pageNumber.GetValueOrDefault(0) * pageSize.Value).Take(pageSize.Value);
}
var trades = await query.ToListAsync();
return(new PagedCollection <MarketTrade>()
{
PageNumber = pageNumber.GetValueOrDefault(0),
PageSize = pageSize.GetValueOrDefault(0),
ItemCount = pageSize.HasValue ? totalCount : trades.Count,
Items = trades.Select(t => new MarketTrade
{
Exchange = t.Exchange,
SymbolCode = t.SymbolCode,
Epoch = Epoch.FromMilliseconds(t.Timestamp),
TradeId = t.TradeId,
Side = t.Side,
Price = t.Price,
Volume = t.Volume
}).ToList()
});
}
}
public async Task <MarketTick> GetTick(ExchangeEnum exchange, SymbolCodeEnum symbolCode, Epoch at)
{
using (var context = ContextFactory.CreateDbContext(null))
{
var minAt = at.AddSeconds((int)TimeSpan.FromDays(-1).TotalSeconds);
var buyTradeQuery =
from
t
in
context.ExchangeTrade
where
t.ExchangeId == (int)exchange &&
t.SymbolId == (int)symbolCode &&
t.Timestamp >= minAt.TimestampMilliseconds &&
t.Timestamp <= at.TimestampMilliseconds &&
t.OrderSideId == (int)OrderSideEnum.Buy
orderby
t.ExchangeId,
t.SymbolId,
t.Timestamp descending
select
t;
var buyTrade = await buyTradeQuery.FirstOrDefaultAsync();
var sellTradeQuery =
from
t
in
context.ExchangeTrade
where
t.ExchangeId == (int)exchange &&
t.SymbolId == (int)symbolCode &&
t.Timestamp >= minAt.TimestampMilliseconds &&
t.Timestamp <= at.TimestampMilliseconds &&
t.OrderSideId == (int)OrderSideEnum.Sell
orderby
t.ExchangeId,
t.SymbolId,
t.Timestamp descending
select
t;
var sellTrade = await sellTradeQuery.FirstOrDefaultAsync();
ExchangeTradeEntity lastTrade = null;
if (buyTrade != null && sellTrade != null)
{
lastTrade = buyTrade.Timestamp <= sellTrade.Timestamp ? buyTrade : sellTrade;
}
else
{
var lastTradeQuery =
from
t
in
context.ExchangeTrade
where
t.ExchangeId == (int)exchange &&
t.SymbolId == (int)symbolCode &&
t.Timestamp >= minAt.TimestampMilliseconds &&
t.Timestamp <= at.TimestampMilliseconds
orderby
t.ExchangeId,
t.SymbolId,
t.Timestamp descending
select
t;
lastTrade = await lastTradeQuery.FirstOrDefaultAsync();
}
if (lastTrade == null)
{
return(null);
}
return(new MarketTick
{
Exchange = exchange,
SymbolCode = symbolCode,
Epoch = at,
BuyPrice = buyTrade != null ? buyTrade.Price : lastTrade.Price,
SellPrice = sellTrade != null ? sellTrade.Price : lastTrade.Price,
LastPrice = lastTrade.Price
});
}
}
public async Task SaveTradeStatAggregates(IStorageTransaction transaction, ExchangeEnum exchange, SymbolCodeEnum symbolCode, ICollection <MarketTradeStat> tradeStats)
{
var min = tradeStats.Min(t => t.Epoch);
var max = tradeStats.Max(t => t.Epoch);
var expanded = new List <TradeStatCartesian>();
foreach (var group in IntervalFactory.ListGroups())
{
foreach (var ik in IntervalFactory.ListIntervalKeys(group.IntervalGroup))
{
foreach (var tradeStat in tradeStats)
{
var period = IntervalFactory.GenerateIntervals(ik, tradeStat.Epoch, tradeStat.Epoch).FirstOrDefault();
expanded.Add(new TradeStatCartesian
{
IntervalKey = period.IntervalKey,
IntervalEpoch = period.From,
Exchange = tradeStat.Exchange,
SymbolCode = symbolCode,
StatKey = tradeStat.StatKey,
Epoch = tradeStat.Epoch,
Value = tradeStat.Value
});
}
}
}
using (var context = ContextFactory.CreateDbContext(null))
{
using (var cmd = context.Database.GetDbConnection().CreateCommand())
{
var sql = @"insert into `exchange_trade_aggregate`
(`exchange_id`,
`symbol_id`,
`interval_key`,
`timestamp`,
`open`,
`open_timestamp`,
`high`,
`low`,
`close`,
`close_timestamp`,
`total_count`) values ";
sql += string.Join(",\r\n", expanded.Select(t => $"(" +
$"{(int)t.Exchange}," +
$"{(int)t.SymbolCode}," +
$"'{t.IntervalKey.Key}'," +
$"{t.IntervalEpoch.TimestampMilliseconds}," +
$"{t.Value}," +
$"{t.Epoch.TimestampMilliseconds}," +
$"{t.Value}," +
$"{t.Value}," +
$"{t.Value}," +
$"{t.Epoch.TimestampMilliseconds}," +
$"1)"));
sql += @"
on duplicate key update
`open` = case when values(`open_timestamp`) < `open_timestamp` then values(`open`) else `open` end,
`open_timestamp` = case when values(`open_timestamp`) < `open_timestamp` then values(`open_timestamp`) else `open_timestamp` end,
`high` = case when values(`high`) > `high` then values(`high`) else `high` end,
`low` = case when values(`low`) < `low` then values(`low`) else `low` end,
`close` = case when values(`close_timestamp`) > `close_timestamp` then values(`close`) else `close` end,
`close_timestamp` = case when values(`close_timestamp`) > `close_timestamp` then values(`close_timestamp`) else `close_timestamp` end,
`total_count` = `total_count` + values(`total_count`)" ;
cmd.CommandText = sql;
await cmd.Connection.OpenAsync();
await cmd.ExecuteNonQueryAsync();
cmd.Connection.Close();
}
}
}
public async Task SaveTradeAggregates(IStorageTransaction transaction, ExchangeEnum exchange, SymbolCodeEnum symbolCode, ICollection <MarketTrade> trades)
{
var min = trades.Min(t => t.Epoch);
var max = trades.Max(t => t.Epoch);
var expanded = new List <TradeCartesian>();
foreach (var group in IntervalFactory.ListGroups())
{
foreach (var ik in IntervalFactory.ListIntervalKeys(group.IntervalGroup))
{
foreach (var trade in trades)
{
var period = IntervalFactory.GenerateIntervals(ik, trade.Epoch, trade.Epoch).FirstOrDefault();
expanded.Add(new TradeCartesian
{
IntervalKey = period.IntervalKey,
IntervalEpoch = period.From,
Exchange = trade.Exchange,
SymbolCode = trade.SymbolCode,
Epoch = trade.Epoch,
TradeId = trade.TradeId,
Price = trade.Price,
Volume = trade.Volume,
Side = trade.Side
});
}
}
}
var context = (HistorianDbContext)transaction.GetContext();
using (var cmd = context.Database.GetDbConnection().CreateCommand())
{
cmd.Transaction = context.Database.CurrentTransaction.GetDbTransaction();
var sql = @"insert into `exchange_trade_aggregate`
(`exchange_id`,
`symbol_id`,
`interval_key`,
`timestamp`,
`open`,
`open_timestamp`,
`high`,
`low`,
`close`,
`close_timestamp`,
`buy_volume`,
`sell_volume`,
`total_volume`,
`buy_count`,
`sell_count`,
`total_count`) values ";
sql += string.Join(",\r\n", expanded.Select(t => $"(" +
$"{(int)t.Exchange}," +
$"{(int)t.SymbolCode}," +
$"'{t.IntervalKey.Key}'," +
$"{t.IntervalEpoch.TimestampMilliseconds}," +
$"{t.Price}," +
$"{t.Epoch.TimestampMilliseconds}," +
$"{t.Price}," +
$"{t.Price}," +
$"{t.Price}," +
$"{t.Epoch.TimestampMilliseconds}," +
$"{(t.Side == OrderSideEnum.Buy ? t.Volume.ToString() : "NULL")}," +
$"{(t.Side == OrderSideEnum.Sell ? t.Volume.ToString() : "NULL")}," +
$"{t.Volume}," +
$"{(t.Side == OrderSideEnum.Buy ? "1" : "NULL")}," +
$"{(t.Side == OrderSideEnum.Sell ? "1" : "NULL")}," +
$"1)"));
sql += @"
on duplicate key update
`open` = case when values(`open_timestamp`) < `open_timestamp` then values(`open`) else `open` end,
`open_timestamp` = case when values(`open_timestamp`) < `open_timestamp` then values(`open_timestamp`) else `open_timestamp` end,
`high` = case when values(`high`) > `high` then values(`high`) else `high` end,
`low` = case when values(`low`) < `low` then values(`low`) else `low` end,
`close` = case when values(`close_timestamp`) > `close_timestamp` then values(`close`) else `close` end,
`close_timestamp` = case when values(`close_timestamp`) > `close_timestamp` then values(`close_timestamp`) else `close_timestamp` end,
`buy_volume` = case when values(`buy_volume`) is not null then ifnull(`buy_volume`, 0) + values(`buy_volume`) else `buy_volume` end,
`sell_volume` = case when values(`sell_volume`) is not null then ifnull(`sell_volume`, 0) + values(`sell_volume`) else `sell_volume` end,
`total_volume` = `total_volume` + values(`total_volume`),
`buy_count` = case when values(`buy_count`) is not null then ifnull(`buy_count`, 0) + values(`buy_count`) else `buy_count` end,
`sell_count` = case when values(`sell_count`) is not null then ifnull(`sell_count`, 0) + values(`sell_count`) else `sell_count` end,
`total_count` = `total_count` + values(`total_count`)";
cmd.CommandText = sql;
await cmd.ExecuteNonQueryAsync();
}
}
public async Task <ICollection <MarketTradeStat> > GetNextTradeStats(ExchangeEnum exchange, SymbolCodeEnum symbolCode, ExchangeStatsKeyEnum statKey, long tradeStatId, int limit = 1)
{
using (var context = ContextFactory.CreateDbContext(null))
{
var tradeStats = context.ExchangeTradeStat
.Where(t => t.ExchangeId == (int)exchange && t.SymbolId == (int)symbolCode && t.StatKeyId == (int)statKey && t.TradeStatId > tradeStatId)
.OrderBy(t => t.TradeStatId)
.Take(limit)
.Select(t => new
{
Exchange = exchange,
SymbolCode = symbolCode,
StatKey = statKey,
Timestamp = t.Timestamp,
TradeStatId = (long)t.TradeStatId,
Value = t.Value
});
var raw = await tradeStats.ToListAsync();
return(raw.Select(t => new MarketTradeStat
{
Exchange = t.Exchange,
SymbolCode = t.SymbolCode,
StatKey = t.StatKey,
Epoch = Epoch.FromMilliseconds(t.Timestamp),
TradeStatId = t.TradeStatId,
Value = t.Value
}).ToList());
}
}
public async Task <string> GetTradeFilter(ExchangeEnum exchange, SymbolCodeEnum symbolCode)
{
var history = await GetSymbol(exchange, symbolCode);
return(history != null ? history.TradeFilter : null);
}
public async Task <PagedCollection <MarketAggregate> > GetTradeAggregates(ExchangeEnum exchange, SymbolCodeEnum symbolCode, IntervalKey intervalKey, Epoch from, Epoch to, int?pageSize, int?pageNumber)
{
var intervals = IntervalFactory.GenerateIntervals(intervalKey, from, to);
var min = intervals.First();
var max = intervals.Last();
using (var context = ContextFactory.CreateDbContext(null))
{
var query = context.ExchangeTradeAggregate
.Where(a => a.ExchangeId == (int)exchange && a.SymbolId == (int)symbolCode && a.IntervalKey == intervalKey.Key && a.Timestamp >= min.From.TimestampMilliseconds && a.Timestamp <= max.From.TimestampMilliseconds);
var totalCount = 0;
if (pageSize.HasValue)
{
totalCount = await query.CountAsync();
query = query.Skip(pageNumber.GetValueOrDefault(0) * pageSize.Value).Take(pageSize.Value);
}
var aggs = await query.ToListAsync();
return(new PagedCollection <MarketAggregate>()
{
PageNumber = pageNumber.GetValueOrDefault(0),
PageSize = pageSize.GetValueOrDefault(0),
ItemCount = pageSize.HasValue ? totalCount : aggs.Count,
Items = aggs.Select(a => new MarketAggregate
{
Exchange = exchange,
Symbol = symbolCode,
IntervalKey = a.IntervalKey,
Epoch = Epoch.FromMilliseconds(a.Timestamp),
Open = a.Open,
OpenEpoch = Epoch.FromMilliseconds(a.OpenTimestamp),
High = a.High,
Low = a.Low,
Close = a.Close,
CloseEpoch = Epoch.FromMilliseconds(a.CloseTimestamp),
BuyVolume = a.BuyVolume,
SellVolume = a.SellVolume,
TotalVolume = a.TotalVolume,
BuyCount = a.BuyCount,
SellCount = a.SellCount,
TotalCount = a.TotalCount
}).ToList()
});
}
}
public async Task SetTradeFilter(IStorageTransaction transaction, ExchangeEnum exchange, SymbolCodeEnum symbolCode, string filter)
{
var context = (HistorianDbContext)transaction.GetContext();
var entity = await context.HistorianExchangeSymbol.FindAsync((int)exchange, (int)symbolCode);
if (entity == null)
{
entity = new HistorianExchangeSymbolEntity
{
ExchangeId = (int)exchange,
SymbolId = (int)symbolCode,
TradeFilter = filter
};
await context.HistorianExchangeSymbol.AddAsync(entity);
}
else
{
entity.TradeFilter = filter;
context.Update(entity);
}
}
public async Task <ICollection <StochasticDataPoint> > Stochastic(ExchangeEnum exchange, SymbolCodeEnum symbolCode, IntervalKey intervalKey, Epoch from, int dataPoints, MovingAverageTypeEnum kMaType, int kFastPeriod, int kSlowPeriod, MovingAverageTypeEnum dMaType, int dSlowPeriod)
{
var dMaTypeConverted = dMaType.ToTaLib();
var kMaTypeConverted = kMaType.ToTaLib();
var periodOffset = kSlowPeriod + 1;
var fromOffset = IntervalFactory.GetInterval(intervalKey, from, periodOffset * -1);
var aggValues = await MarketRepository.GetTradeAggregates(exchange, symbolCode, intervalKey, fromOffset.From, periodOffset + dataPoints);
var highPoints = aggValues.GetValues(CandleTypeEnum.High);
var lowPoints = aggValues.GetValues(CandleTypeEnum.Low);
var closePoints = aggValues.GetValues(CandleTypeEnum.Close);
int outBegIdx, outNbElement;
var kValues = new double[dataPoints];
var dValues = new double[dataPoints];
var retCode = Stoch(0, closePoints.Length - 1, highPoints, lowPoints, closePoints, kFastPeriod, kSlowPeriod, kMaTypeConverted, dSlowPeriod, dMaTypeConverted, out outBegIdx, out outNbElement, kValues, dValues);
var validKValues = kValues.Skip(outNbElement - dataPoints).Take(dataPoints).ToArray();
var validDValues = dValues.Skip(outNbElement - dataPoints).Take(dataPoints).ToArray();
var validAggValues = aggValues.Skip(aggValues.Count - dataPoints).Take(dataPoints).ToArray();
if (retCode == RetCode.Success)
{
var dp = new List <StochasticDataPoint>();
for (var i = 0; i < validAggValues.Length; i++)
{
var agg = validAggValues[i];
dp.Add(new StochasticDataPoint
{
Epoch = agg.Epoch,
D = validKValues[i],
K = validDValues[i],
});
}
return(dp);
}
throw new Exception("Unable to calculate Stochastic - " + retCode);
}
public async Task <MarketTickAverage> GetTickAverage(ICollection <ExchangeEnum> exchanges, SymbolCodeEnum symbolCode, Epoch at)
{
var ticks = new Dictionary <ExchangeEnum, MarketTick>();
foreach (var exchange in exchanges)
{
var tick = await GetTick(exchange, symbolCode, at);
if (tick != null)
{
ticks.Add(exchange, tick);
}
}
if (ticks.Count == 0)
{
return(null);
}
return(new MarketTickAverage
{
Epoch = at,
SymbolCode = symbolCode,
BuyPrice = ticks.Values.Average(t => t.BuyPrice),
SellPrice = ticks.Values.Average(t => t.SellPrice),
LastPrice = ticks.Values.Average(t => t.LastPrice),
Exchanges = ticks.Keys.ToList()
});
}
public async Task SetLastTradeStatId(IStorageTransaction transaction, ExchangeEnum exchange, SymbolCodeEnum symbolCode, long lastTradeStatId)
{
var context = (HistorianDbContext)transaction.GetContext();
var history = await context.HistorianExchangeSymbol.FindAsync((int)exchange, (int)symbolCode);
if (history == null)
{
history = new HistorianExchangeSymbolEntity
{
ExchangeId = (int)exchange,
SymbolId = (int)symbolCode
};
await context.HistorianExchangeSymbol.AddAsync(history);
}
history.LastTradeStatId = lastTradeStatId;
}
public async Task <long?> GetLastTradeStatId(ExchangeEnum exchange, SymbolCodeEnum symbolCode)
{
var history = await GetSymbol(exchange, symbolCode);
return(history != null ? history.LastTradeStatId : null);
}
private async Task <HistorianExchangeSymbolEntity> GetSymbol(ExchangeEnum exchange, SymbolCodeEnum symbolCode)
{
using (var context = ContextFactory.CreateDbContext(null))
{
return(await context.HistorianExchangeSymbol.FindAsync((int)exchange, (int)symbolCode));
}
}
public async Task <HistorianTradeCatchup> GetNextTradeCatchup(ExchangeEnum exchange, SymbolCodeEnum symbolCode)
{
using (var context = ContextFactory.CreateDbContext(null))
{
var next = await context.HistorianTradeCatchup
.Where(c => c.ExchangeId == (int)exchange && c.SymbolId == (int)symbolCode)
.OrderByDescending(c => c.TimestampTo)
.OrderBy(c => c.Priority)
.FirstOrDefaultAsync();
return(next != null ?
new HistorianTradeCatchup
{
Exchange = (ExchangeEnum)next.ExchangeId,
SymbolCode = (SymbolCodeEnum)next.SymbolId,
TradeFilter = next.TradeFilter,
EpochTo = Epoch.FromMilliseconds(next.TimestampTo),
CurrentTradeFilter = next.CurrentTradeFilter,
Priority = next.Priority
} : null);
}
}
public async Task <ICollection <BollingerBandsDataPoint> > BollingerBands(ExchangeEnum exchange, SymbolCodeEnum symbolCode, IntervalKey intervalKey, Epoch from, int dataPoints, CandleTypeEnum candleType, int period, MovingAverageTypeEnum maType, double stdDevUp, double stdDevDown)
{
var maTypeConverted = maType.ToTaLib();
var periodOffset = period - 1;
var fromOffset = IntervalFactory.GetInterval(intervalKey, from, periodOffset * -1);
var aggValues = await MarketRepository.GetTradeAggregates(exchange, symbolCode, intervalKey, fromOffset.From, periodOffset + dataPoints);
var values = aggValues.GetValues(candleType);
int outBegIdx, outNbElement;
var upperBandValues = new double[dataPoints];
var middleBandValues = new double[dataPoints];
var lowerBandValues = new double[dataPoints];
var retCode = Bbands(0, values.Length - 1, values, period, stdDevUp, stdDevDown, maTypeConverted, out outBegIdx, out outNbElement, upperBandValues, middleBandValues, lowerBandValues);
var validUpperBandValues = upperBandValues.Skip(outNbElement - dataPoints).Take(dataPoints).ToArray();
var validMiddleBandValues = middleBandValues.Skip(outNbElement - dataPoints).Take(dataPoints).ToArray();
var validLowerBandValues = lowerBandValues.Skip(outNbElement - dataPoints).Take(dataPoints).ToArray();
var validAggValues = aggValues.Skip(aggValues.Count - dataPoints).Take(dataPoints).ToArray();
if (retCode == RetCode.Success)
{
var dp = new List <BollingerBandsDataPoint>();
for (var i = 0; i < validAggValues.Length; i++)
{
var agg = validAggValues[i];
dp.Add(new BollingerBandsDataPoint
{
Epoch = agg.Epoch,
Upper = upperBandValues[i],
Middle = middleBandValues[i],
Lower = lowerBandValues[i]
});
}
return(dp);
}
throw new Exception("Unable to calculate Bollinger Bands - " + retCode);
}
public async Task <ICollection <MarketAggregate> > GetTradeAggregates(ExchangeEnum exchange, SymbolCodeEnum symbolCode, IntervalKey intervalKey, Epoch from, int dataPoints)
{
var intervals = IntervalFactory.GenerateIntervals(intervalKey, from, dataPoints);
var min = intervals.First();
var max = intervals.Last();
var aggs = await GetTradeAggregates(exchange, symbolCode, intervalKey, min.From, max.From, null, null);
return(aggs.Items);
}
public async Task <ICollection <MarketTrade> > GetNextTrades(ExchangeEnum exchange, SymbolCodeEnum symbolCode, Epoch from, long tradeId, int limit = 1)
{
using (var context = ContextFactory.CreateDbContext(null))
{
var trades = context.ExchangeTrade
.Where(t => t.ExchangeId == (int)exchange && t.SymbolId == (int)symbolCode && t.Timestamp >= from.TimestampMilliseconds && t.TradeId > tradeId)
.OrderBy(t => t.TradeId)
.Take(limit)
.Select(t => new
{
Exchange = exchange,
SymbolCode = symbolCode,
Timestamp = t.Timestamp,
TradeId = (long)t.TradeId,
Side = t.OrderSideId.HasValue ? (OrderSideEnum)t.OrderSideId : (OrderSideEnum?)null,
Price = t.Price,
Volume = t.Volume
});
var raw = await trades.ToListAsync();
return(raw.Select(t => new MarketTrade
{
Exchange = t.Exchange,
SymbolCode = t.SymbolCode,
Epoch = Epoch.FromMilliseconds(t.Timestamp),
TradeId = t.TradeId,
Side = t.Side,
Price = t.Price,
Volume = t.Volume
}).ToList());
}
}
public static IDisposable BeginSymbolScope(this ILogger logger, SymbolCodeEnum symbolCode)
{
return(logger.BeginScope(new { SymbolCode = symbolCode }));
}
