protected override int GetCount(ICachedTradeHistogram histogram) { return(histogram.AskTradesCount - histogram.BidTradesCount); }
protected abstract int GetCount(ICachedTradeHistogram histogram);
protected override double GetValue(ICachedTradeHistogram histogram) { return(histogram.DeltaAskBidQuantity); }
protected abstract double GetValue(ICachedTradeHistogram histogram);