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(1)
plus:= day<>ref(day,1);
sum(V, barslast(plus) +1);
(2)
plus:= day<>ref(day,1);
A1:=ref( plus*barpos , barslast(plus));
B1:= SYSPARAM(1)>=A1 AND (SYSPARAM(1)-A1)<=barslast(plus);
V2:= if(barpos >= barssince(B1), sum(V, sum(B1,0)),0 );
V2:= if(barpos< lbound(V2),0,V2);
sum(V,barslast(plus)+1)*(B1<=0) + V2*(B1>0) ,volstick;
vertline(plus),colorcyan,linedot;
vertline(barpos=SYSPARAM(1)),coloryellow,linedot;
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