private async Task UpdateExecution()
{
if (this.executionCycle != null)
{
this.updatingExecution = true;
int selectedIndex = this.CurrencyCyclesListView.SelectedIndex;
CurrencyCycleListViewItem item = executionCycle.Value;
ArbitragePath arbitragePath = item.ArbitragePath;
Ticker[,] tickers = this.tickers;
decimal sourceQuantity = 0.1m;
List <ExecutionListViewItem> items = new List <ExecutionListViewItem>();
for (int i = 1; i < arbitragePath.Currencies.Count; i++)
{
string sourceCurrency = arbitragePath.Currencies[i - 1];
string destinationCurrency = arbitragePath.Currencies[i];
int sourceCurrencyIndex = item.Exchange.Currencies.IndexOf(sourceCurrency);
int destinationCurrencyIndex = item.Exchange.Currencies.IndexOf(destinationCurrency);
TradeType type;
(string, string)tradingPair;
switch (item.Exchange.TradingPairs[item.Exchange.Currencies.IndexOf(destinationCurrency), item.Exchange.Currencies.IndexOf(sourceCurrency)])
{
case TradingPairType.Buy:
type = TradeType.Buy;
tradingPair = (destinationCurrency, sourceCurrency);
break;
case TradingPairType.Sell:
type = TradeType.Sell;
tradingPair = (sourceCurrency, destinationCurrency);
break;
case TradingPairType.Invalid:
default:
throw new InvalidOperationException();
}
Ticker ticker = tickers[item.Exchange.Currencies.IndexOf(tradingPair.Item1), item.Exchange.Currencies.IndexOf(tradingPair.Item2)];
OrderBook orderBook = await item.Exchange.GetOrderBook(tradingPair);
decimal destinationQuantity;
OrderBookEntry buyOrder = orderBook.Bids[0];
OrderBookEntry sellOrder = orderBook.Asks[0];
if (type == TradeType.Buy)
{
// destinationQuantity = sourceQuantity / ticker.LowestAskPrice * (1m - item.Exchange.FeePercentage * 0.01m);
// sellOrder.Price = ticker.LowestAskPrice;
(destinationQuantity, sellOrder) = orderBook.ComputeBuyQuantity(sourceQuantity).Value;
ticker.LowestAskPrice = sellOrder.Price;
}
else
{
// destinationQuantity = sourceQuantity * ticker.HighestBidPrice * (1m - item.Exchange.FeePercentage * 0.01m);
// buyOrder.Price = ticker.HighestBidPrice;
(destinationQuantity, buyOrder) = orderBook.ComputeSellCost(sourceQuantity).Value;
ticker.HighestBidPrice = buyOrder.Price;
}
items.Add(new ExecutionListViewItem
{
Exchange = item.Exchange,
TradingPair = tradingPair,
Type = type,
Price = type == TradeType.Buy ? ticker.LowestAskPrice : ticker.HighestBidPrice,
Ticker = ticker,
OrderBook = orderBook,
BuyOrder = buyOrder,
SellOrder = sellOrder,
SourceQuantity = sourceQuantity,
DestinationQuantity = destinationQuantity
});
sourceQuantity = destinationQuantity;
}
if (this.CurrencyCyclesListView.SelectedIndex == selectedIndex)
{
await this.Dispatcher.InvokeAsync(() =>
{
this.ExecutionListView.Items.Clear();
items.ForEach(x => this.ExecutionListView.Items.Add(x));
});
}
this.updatingExecution = false;
}
else
{
this.ExecutionListView.Items.Clear();
}
}