成本均线
CHUQUAN:=1; C20:SUM(AMOUNT,20)/SUM(VOL*100*CHUQUAN,20); C60:SUM(AMOUNT,60)/SUM(VOL*100*CHUQUAN,60); C120:SUM(AMOUNT,120)/SUM(VOL*100*CHUQUAN,120); C480:SUM(AMOUNT,480)/SUM(VOL*100*CHUQUAN,480);