学会这个方法，抓10倍大牛股的概率提升10倍>>

卖出撤单:WIDTHDRAWORDER(2),colorred,linethick1;

买进撤单:WIDTHDRAWORDER(1),colorgreen,linethick1;

撤卖单累计:sum(卖出撤单,0)/20,colorblue,linethick2;

撤买单累计:sum(买进撤单,0)/20,colorwhite,linethick2;

净撤量:撤卖单累计-撤买单累计;