买卖挺准之买入选股指标公式

RSV:=(((CLOSE-LLV(LOW,20))/(HHV(HIGH,20)-LLV(LOW,20)))*100);
趋势:=3*SMA(RSV,5,1)-2*SMA(SMA(RSV,5,1),3,1);
买入:crOSS(趋势,10);