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