public double CalculateVolumeWeightedStockPrice(string stockSymbol, int timeFilter = 5) => DoCalculate(
stockSymbol,
stock =>
{
var fromDateTime = DateTime.UtcNow.Subtract(new TimeSpan(0, timeFilter, 0));
var stockTrades = _trade.GetAllTradesByStockAndDate(stock.Symbol, fromDateTime).ToList();
return(stockTrades.Any()
? MathFormulaCalculations.VolumeWeightedStockPrice(stockTrades)
: 0);
});
