只股票的涨跌与否，除去跟随大盘的波动之外，最主要的是看是否有资金参与其中，是否有主力在其中买卖活跃，资金到位，人气活跃了，想不涨都难。
 股票涨多少，就看主力兴风作浪的能力了。所以，我们需要一个指标来观测主力的买卖情况，主动买盘，主动卖盘，买卖差，分别占得比重是多少等等。

源码

■多头:0,COLOR0000FF;STICKLINE((CLOSE > MA(CLOSE,30)),0,VOL,3,1),COLOR0000FF;
□空头:0,COLORFF937F;STICKLINE((CLOSE < MA(CLOSE,30)),0,VOL,3,1),COLORFF937F;
VAR0:=VOL/((HIGH-LOW)*2-ABS(CLOSE-OPEN));
成交总量:VOL,POINTDOT;
主买:IF(CLOSE>OPEN,VAR0*(HIGH-LOW),IF(CLOSE<OPEN,VAR0*((HIGH-OPEN)+(CLOSE-LOW)),VOL/2)),COLORRED,POINTDOT;
VAR1:=(VOL / (((HIGH - LOW) * 2) - ABS((CLOSE - OPEN)))); 
买盘:=IF((CLOSE > OPEN),(VAR1 * (HIGH - LOW)),IF((CLOSE < OPEN),(VAR1 * ((HIGH - OPEN) + (CLOSE - LOW))),(VOL / 2)));  
主买占%:买盘/100000,COLORRED,NODRAW;
主卖:IF(CLOSE>OPEN,0-VAR0*((HIGH-CLOSE)+(OPEN-LOW)),IF(CLOSE<OPEN,0-VAR0*(HIGH-LOW),0-VOL/2)),COLOR00FF00,POINTDOT;
卖盘:=IF((CLOSE > OPEN),(0 - (VAR1 * ((HIGH - CLOSE) + (OPEN - LOW)))),IF((CLOSE < OPEN),(0 - (VAR1 * (HIGH - LOW))),(0 - (VOL / 2))));  
主卖占%:-卖盘/100000,COLOR00FF00,POINTDOT,NODRAW;
震动调整:=(买盘 + 卖盘);
STICKLINE((震动调整 < 1),1,震动调整,3,0),COLOR70DB93;
买卖量差%:((买盘)+(卖盘))/100000,COLORFF00FF;
STICKLINE((买卖量差% < 0),0,买卖量差%,3,0),COLORWHITE,LINETHICK0;
VAR2:=(HIGH - LOW);  
VAR3:=ABS((OPEN - CLOSE));