public void SetDefaultPriceForInstructionWhenNecessary(Instruction instruction)
{
if (_settings == null)
{
return;
}
if (instruction.Price == null)
{
TradingPrice price;
if (instruction.Action == TradingAction.OpenLong)
{
price = new TradingPrice(_settings.OpenLongPricePeriod, _settings.OpenLongPriceOption, 0.0);
}
else if (instruction.Action == TradingAction.CloseLong)
{
price = new TradingPrice(_settings.CloseLongPricePeriod, _settings.CloseLongPriceOption, 0.0);
}
else
{
throw new InvalidOperationException(
string.Format("unsupported action {0}", instruction.Action));
}
instruction.Price = price;
}
}
private void CreateInstructionForBuying(ITradingObject tradingObject, TradingPrice price, string comments, object[] relatedObjects)
{
_instructionsInCurrentPeriod.Add(
new OpenInstruction(_period, tradingObject, price)
{
Comments = comments,
Volume = 0, // will be filled in EstimateStoplossAndSizeOfNewPosition()
StopLossGapForBuying = 0.0, // will be filled in EstimateStoplossAndSizeOfNewPosition()
StopLossPriceForBuying = 0.0, // will be filled in EstimateStoplossAndSizeOfNewPosition()
RelatedObjects = relatedObjects
});
}
private void GenerateInstructions(ITradingObject[] tradingObjects, Bar[] bars)
{
// check if positions needs to be adjusted
if (_positionAdjusting != null)
{
var instructions = _positionAdjusting.AdjustPositions();
if (instructions != null)
{
foreach (var instruction in instructions)
{
if (instruction.Action == TradingAction.OpenLong)
{
// comment out below code because evaluation result shows it will degrade performance.
//if (_globalSettings.AllowEnteringMarketOnlyWhenPriceIncreasing)
//{
// var bar = bars[instruction.TradingObject.Index];
// if (bar.ClosePrice <= bar.OpenPrice)
// {
// continue;
// }
//}
}
_instructionsInCurrentPeriod.Add(instruction);
}
}
}
for (var i = 0; i < tradingObjects.Length; ++i)
{
var tradingObject = tradingObjects[i];
var bar = bars[i];
if (bar.Time == Bar.InvalidTime)
{
continue;
}
Position[] positions;
if (_context.ExistsPosition(tradingObject.Code))
{
var temp = _context.GetPositionDetails(tradingObject.Code);
positions = temp as Position[] ?? temp.ToArray();
}
else
{
positions = new Position[0];
}
// decide if we need to stop loss for some positions.
bool isStopLost = false;
List <CloseInstruction> stopLossInstructions = new List <CloseInstruction>();
foreach (var position in positions)
{
var stopLossPrice = double.MaxValue;
if (_globalSettings.StopLossByClosePrice)
{
if (position.StopLossPrice > bar.ClosePrice)
{
stopLossPrice = Math.Min(bar.ClosePrice, stopLossPrice);
}
}
else
{
if (position.StopLossPrice > bar.OpenPrice)
{
stopLossPrice = Math.Min(bar.OpenPrice, stopLossPrice);
}
else if (position.StopLossPrice > bar.LowestPrice)
{
stopLossPrice = Math.Min(position.StopLossPrice, stopLossPrice);
}
}
if (stopLossPrice < double.MaxValue)
{
TradingPrice price = new TradingPrice(
TradingPricePeriod.CurrentPeriod,
TradingPriceOption.CustomPrice,
stopLossPrice);
stopLossInstructions.Add(new CloseInstruction(_period, tradingObject, price)
{
Comments = string.Format("stop loss @{0:0.000}", stopLossPrice),
SellingType = SellingType.ByStopLossPrice,
StopLossPriceForSelling = stopLossPrice,
PositionIdForSell = position.Id,
Volume = position.Volume,
});
isStopLost = true;
}
}
// decide if we need to exit market for this trading object.
bool isExited = false;
List <CloseInstruction> exitInstructions = new List <CloseInstruction>();
if (positions.Any())
{
foreach (var component in _marketExiting)
{
var marketExitingResult = component.ShouldExit(tradingObject);
if (marketExitingResult.ShouldExit)
{
exitInstructions.Add(new CloseInstruction(_period, tradingObject, marketExitingResult.Price)
{
Comments = "Exiting market: " + marketExitingResult.Comments,
SellingType = SellingType.ByVolume,
Volume = positions.Sum(p => p.Volume),
});
isExited = true;
}
}
}
if (isStopLost || isExited)
{
// merge stop loss instructions and exit instructions
var instructions = MergeStopLossAndExitInstructions(stopLossInstructions, exitInstructions);
if (instructions.Any())
{
_instructionsInCurrentPeriod.AddRange(instructions);
}
// if there is position to stop loss or exit for given trading object,
// we will never consider entering market for the object.
continue;
}
// decide if we should enter market
if (!positions.Any())
{
if (!_globalSettings.AllowEnteringMarketOnlyWhenPriceIncreasing || bar.ClosePrice > bar.OpenPrice)
{
var allResults = new List <MarketEnteringComponentResult>();
bool canEnter = true;
foreach (var component in _marketEntering)
{
var marketEnteringResult = component.CanEnter(tradingObject);
if (!marketEnteringResult.CanEnter)
{
canEnter = false;
break;
}
allResults.Add(marketEnteringResult);
}
if (canEnter)
{
int nonDefaultPriceCount = allResults.Count(r => r.Price != null);
if (nonDefaultPriceCount > 1)
{
throw new InvalidOperationException("there are more than one non-default price for entering market");
}
TradingPrice price = nonDefaultPriceCount == 0
? null
: allResults.Where(r => r.Price != null).First().Price;
var comments = "Entering market: " +
string.Join(";", allResults.Select(r => r.Comments).Where(c => c != null));
var relatedObjects = allResults.Select(r => r.RelatedObject).Where(r => r != null);
CreateInstructionForBuying(
tradingObject,
price,
comments,
relatedObjects.Count() == 0 ? null : relatedObjects.ToArray());
_context.DumpBarsFromCurrentPeriod(tradingObject);
}
}
}
}
// update default price for instructions
foreach (var instruction in _instructionsInCurrentPeriod)
{
_context.SetDefaultPriceForInstructionWhenNecessary(instruction);
}
}
public TradingStrategyComponentResult()
{
Comments = string.Empty;
Price = null;
}