Gann Swing overlay

[Forex Trader]

Has anybody done anything to build a Gann swing indicator? This is the traditional 3-day indicator.

I am very interested in building this indicator, but need help with setting up the code to check each bar with the bar arrays working in reverse.

Thanks
Des

[Forex Trader]

I found the following code on a MetaStock site.

Gann-Swing - Metastock Indicator Formula
by Adam Hefner

{Market swing is defined as:
Up = 2 higher highs,
Down = 2 lower highs.}
Us:=BarsSince((H > Ref(H,-1)) AND (Ref(H,-1) >
Ref(H,-2)));
Ds:=BarsSince((L < Ref(L,-1)) AND (Ref(L,-1) <
Ref(L,-2)));
Sd1:=If(Us=0,
{then}If(Ref(L,-1)<>LowestSince(1,Ds=0,L),
{then}1,
{else}0),
{else}If(Ds=0,
{then}If(Ref(H,-1)<>
HighestSince(1,Us=0,H),
{then}-1,
{else}0),
{else}0));
Sd2:=If(Sd1=1,
{then} If(Ref(BarsSince(Sd1=1),-1) >
Ref(BarsSince(Sd1=-1),-1),
{then}1,
{else}0),
{else} If(Sd1=-1,
{then}If(Ref(BarsSince(Sd1=1),-1) <
Ref(BarsSince(Sd1=-1),-1),
{then}-1,
{else}0),
{else}0));
TD1:=ValueWhen(1,Sd2<>0,Sd2);
Td1;