Last Candles

Hi,

I would like to identify the last Long(open<close) and last Short(open>close) candles from the latest 20 bars in the "Index" dataseries? So, I'd like to see only 2 triggers. One for last long and another for last short candle.

I wrote this code, but it shows 20 trigger point. How can I find the last 2?

Can someone complete my code please?

    if (IsRealTime)
 	{
 	
        for(int i = index -20; i < index +1; i++)
 	    {
 	        if(MarketSeries.Open[i] > MarketSeries.Close[i])
            {             	      
                LongEntry[i] = MarketSeries.High[i];
                ShortEntry[i] = double.NaN;
            }
            
 	        if(MarketSeries.Open[i] < MarketSeries.Close[i])
            {             	      
                ShortEntry[i] = MarketSeries.Low[i];
                LongEntry[i] = double.NaN;
            }
        }            
 	}

THX!