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Greetings Yuki,
see interspersed comments.
On Fri, 4 Jul 2003 07:47 am, Yuki Taga wrote:
> Can anyone show me the edit that will allow my beginning price bars
> to be visible. Right now they are invisible, since at the beginning
> of the data neither condition in the code applies. Oddly, they match
> my background, and I cannot control this from preferences.
>
> Title = Name() +" - "+ WriteVal( DateTime(), formatDateTime )+" -
> "+"Open: "+WriteVal(O,1.0)+" "+" - Hi: "+WriteVal(H,1.0)+" "+" - Low:
> "+WriteVal(L,1.0)+" "+" - Close: "+WriteVal(C,1.0)+" - Volume:
> "+WriteVal(V,1);
>
>
> F1=ValueWhen(H<Ref(H,-2) AND Ref(H,-1)<Ref(H,-2) AND
> Ref(H,-3)<Ref(H,-2) AND Ref(H,-4)<Ref(H,-2),Ref(H,-2),1);
> F2=ValueWhen(L>Ref(L,-2) AND Ref(L,-1)>Ref(L,-2) AND
> Ref(L,-3)>Ref(L,-2) AND Ref(L,-4)>Ref(L,-2),Ref(L,-2),1);
>
> A=Cross(H,F1);
> b=Cross(F2,L);
>
> Buy=BarsSince(A)<BarsSince(b);
> Short =BarsSince(A)>BarsSince(b);
> Cover=Buy;
> Sell=Short;
>
> Buy=ExRem(Buy,Sell);
> Sell=ExRem(Sell,Buy);
> Cover=ExRem(Cover,Short);
> Short=ExRem(Short,Cover);
>
> X = Buy OR Sell;
Before the first Buy or Sell, X will be 0;
>
> Plot( Close, Date() +"\n"+ "O: " + WriteVal( Open, 1.2 ) +"\n"+ "H: " +
> WriteVal(High, 1.2 ) +"\n"+ "L: " + WriteVal( Low, 1.2 ) +"\n"+ "C: ",
> ValueWhen(X,IIf(Sell,colorRed,colorDarkGreen)), styleBar);
ValueWhen(X, ....) will return Null when X is False (ie 0) or Null.
Wrap it in a Nz(), like this
Nz(ValueWhen(X,IIf(Sell,colorRed,colorDarkGreen)), colorYellow)
so it will plot in Yellow (substitute as required), up till the first Buy or
Sell.
>
> Plot(MA(C,18), "18-day SMA", colorRed, 4);
>
> Yuki
>
- --
Nigel Rowe
rho@xxxxxxxxxxx
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