例:
MA1=ma(c,1);
MA2=ma(c,2);
MA3=ma(c,3);
if cross(MA2,ma3) THEN buy(''2,0,0);
if cross(ma2,ma1) then (减一手)应该如何写
MA1=ma(c,1);
MA2=ma(c,2);
MA3=ma(c,3);
if cross(MA2,ma3) THEN buy(1,10,thisclose);
if cross(ma2,ma1) then sell(1,1,thisclose);