賣出撤單:WIDTHDRAWORDER(2),colorred,linethick1;
買進撤單:WIDTHDRAWORDER(1),colorgreen,linethick1;
撤賣單累計:sum(賣出撤單,0)/20,colorblue,linethick2;
撤買單累計:sum(買進撤單,0)/20,colorwhite,linethick2;
凈撤量:撤賣單累計-撤買單累計;