多空成交量源码

n:1 999 20
 APP:=VOL/((HIGH-LOW)*2-ABS(CLOSE-OPEN));
 DEMAND:IF(CLOSE>OPEN,APP*(HIGH-LOW),IF(CLOSE  SUPLY:IF(CLOSE>OPEN,0-APP*((HIGH-CLOSE)+(OPEN-LOW)),IF(CLOSE  DMA1:MA(DEMAND,n);
 SMA1:MA(SUPLY,n);