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This is a repost of the formula from Spyros, taken
from archives.
Formula Name: SR ZigZag Trend{SR ZigZag
Trend}{by Spyros Raftopoulos}{E-mail :
raftsp@xxxxxxxxx}{This binary indicator is based on the Metastock's Zig
Zag function.1 = confirmed uptrend, -1 = confirmed
downtrend}perc:=Input("percent",1,100,10);tr:=ValueWhen(1,Zig(C,perc,%)>Ref(Zig(C,perc,%),-1)
ANDRef(Zig(C,perc,%),-1)<Ref(Zig(C,perc,%),-2),Ref(Zig(C,perc,%),-1));tr:=If(
(C-tr)*100/tr>= perc ,tr,0);tr:=If( tr=0, ValueWhen(1,tr<>0,tr),
tr);pk:=ValueWhen(1,Zig(C,perc,%)<Ref(Zig(C,perc,%),-1)
ANDRef(Zig(C,perc,%),-1)>Ref(Zig(C,perc,%),-2),Ref(Zig(C,perc,%),-1));pk:=If((C-pk)*100/pk
<=-perc , pk, 0);pk:=If( pk=0, ValueWhen(1,pk<>0,pk),
pk);res:=If(pk<>Ref(pk,-1), -1,If(tr<>Ref(tr,-1), 1,
0));res:=If(res=0,ValueWhen(1,res<>0,res),res);res
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