private async void ClosePosition(StockTrade trade, Api.Interval interval)
{
StockData data = await StockDataBase.Get(trade.Stock, interval);
StockPosition position = GetPosition(trade.Stock);
double posValue = GetPositionValue(position, data, trade.DataIndex);
position.Amount = 0;
Cash += posValue;
}
private double GetPositionValue(StockPosition position, StockData data, int dataIndex)
{
double posValue;
double entryPrice = data.TimeSeries.DataPoints[position.EntryIndex].Close;
if (position.Type == StockTradeType.LongStock)
{
posValue = data.TimeSeries.DataPoints[dataIndex].Close * position.Amount;
}
else
{
posValue = (entryPrice + entryPrice - data.TimeSeries.DataPoints[dataIndex].Close) * position.Amount;
}
return(posValue);
}
private async void OpenPosition(StockTrade trade, Api.Interval interval)
{
StockData data = await StockDataBase.Get(trade.Stock, interval);
StockPosition position = GetPosition(trade.Stock);
double totalBalance = await TotalBalance(trade.DataIndex, interval);
position.EntryIndex = trade.DataIndex;
double entryPrice = data.TimeSeries.DataPoints[trade.DataIndex].Close;
double budget = totalBalance * trade.PortfolioPercentage;
position.Amount = (int)(budget / entryPrice);
position.Type = trade.Type;//long or short
Cash -= position.Amount * entryPrice;
}
private StockPosition GetPosition(Stock stock)
{
if (stock != null)
{
for (int i = 0; i < Positions.Count; i++)
{
if (Positions[i].Stock.StockSymbol == stock.StockSymbol)
{
return(Positions[i]);
}
}
}
StockPosition newPos = new StockPosition();
newPos.Stock = stock;
Positions.Add(newPos);
return(Positions[Positions.Count - 1]);
}