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Also, check out messages #11896, 12560 & 28399.
dale b
--- In amibroker@xxxxxxxxxxxxxxx, "rck1135" <rkrebs@xxxx> wrote:
> Thanks to Ara, Graham and Jayson for your responses to my post re
the
> Laguerre RSI indicator. Obviously, the MS code is vastly different
> than the AFL language, but the result is plotted by the 'IF'
> statement in the last line; If temp is equal to -1 then display
a '0'
> otherwise display the value of 'cu divided by temp'. The trick in
> this formula is to duplicate the MS 'Prev' function and I
appreciate
> the references to past posts on this subject. The 'Prev' constant
> allows one to create self-referencing formulas - one that is able
to
> reference the previous period's value of itself. Example:
> ((H+L+C)/3)+PREV
> the formula divides the High, Low and Close price by 3 and then
adds
> this value to Yesterday's value of the ((H+L+C)/3).
> One wouls assume that the PREV function could be readily replace by
> the AB Ref() function, but it is not that easy. At any rate I will
> continue to attemp[t a conversion of this indicator as it is pretty
> good.
>
> Thanks again,
> Ron
>
>
>
> g:=0.5;
> L0:=((1-g)*C) + (g*PREV);
> L1:=(-g*L0) + Ref(L0,-1) + (g*PREV);
> L2:=(-g*L1) + Ref(L1,-1) + (g*PREV);
> L3:=(-g*L2) + Ref(L2,-1) + (g*PREV);
>
> cu:= If(L0>L1, L0-L1,0) + If(L1>L2, L1-L2,0) + If(L2>L3, L2-L3,0);
> cd:= If(L0<L1, L1-L0,0) + If(L1<L2, L2-L1,0) + If(L2<L3, L3-L2,0);
>
> temp:= If(cu+cd=0, -1,cu+cd);
> If(temp=-1,0,cu/temp)
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