编写条件：
源码如下： input:n1(5,0,100); a:=((BIGORDER(1,2) - BIGORDER(2,2)) *AMOUNT/10000) ; STICKLINE(a>0,0,a,6,0 ),COLORred; STICKLINE(a<0,0,a,6,0 ),COLORgreen; 当日资金净流:a,precis4,linethick0; 请改成：视图范围内，每日资金流加减汇总，总和数值显示在画面上.当视图范围发生变化时，总和数值相应变化。编写方法：
a:=((BIGORDER(1,2) - BIGORDER(2,2)) *AMOUNT/10000);
B:=SUM(A,BArslAST(DISPSTATUS=1));
STICKLINE(a>0,0,a,6,0 ),COLORred;
STICKLINE(a<0,0,a,6,0 ),COLORgreen;
当日资金净流:a,precis4,linethick0;
视图资金:B,COLORYELLOW;
PARTLINE(B,B<=REF(B,1)),COLORBLUE;
