Help! Trading System is Failing in recent rally

["jnk1997" <jnk1997@xxxx>]

I have been using the following trading system on the QQQ and have 
had success in downward market (going short). The system appears to 
work better going short rather than long. 
Backtest from the beginning of 2002 and you will see on QQQ this 
formula picks tops well, but does not pick bottoms properly.
Any ideas out there on how to improve performance going long?
Thanks in advance
Jim

/* Stochastic - RSI , and ADX*/


StoRSI = EMA((scRSI(C,8) - LLV(scRSI(C,8),8))/

(HHV(scRSI(C,8),8) - LLV(scRSI(C,8),8)),3)*100;

Buy = Cross(17,StoRSI) AND ADX(14)>20;

Sell= Cross(StoRSI,83) ;

Short = Sell;

Cover = Buy;

//Plot(Equity(),"Equity",1,1);

Plot(StoRSI,"StoRSI",1,1);