M:=2;
MA30:=MA(C,30);
MA60:=MA(C,60);
MA90:=MA(C,90);
MA250:=MA(C,250);
MA120:=MA(C,120);
AA:=MAX(MA120,MAX(MA30,MAX(MA60,MA90)));
{30/60/90、120日均线中做大值}
BB:=MIN(MA120,MIN(MA30,MIN(MA60,MA90)));
{30/60/