非常有用的符合实战的资金流向，结合波段操作公式一起使用效果更佳
drawband(3*(ema(c,3)-ema(c,8)-ema(ema(c,3)-ema(c,8),20))*0.01,rgb(250,0,00),0,rgb(0,180,180));
{主力资金流向}
VAR1:=VOL*CLOSE;
VAR2:=SUM(VAR1,0);
VAR3:=SUM(VOL,0);
VAR4:=VAR2/VAR3;
VAR5:=IF(CLOSE>VAR4,VOL,0);
VAR6:=IF(CLOSE<VAR4,VOL,0);
VAR7:=SUM(VAR5,0);
VAR8:=SUM(VAR6,0);
主力资金流入:VAR7;
主力资金流出:VAR8;
主力资金净额:VAR7-VAR8;
