Vertical Line Bull Bear Zone - Amibroker AFL Code

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// Adjust the following parameters to suit your needs
period = 5;
numChg = 0.001;

// --------------------------------------------
// Divergence for LONG
// --------------------------------------------

trendMom = RSI(period);
trendZig = Zig(L, numChg);

f = trendZig > Ref(trendZig, -1) AND Ref(trendZig, -1) < Ref(trendZig, -2);

p1 = ValueWhen(f, Ref(trendZig, -1), 1);
p2 = ValueWhen(f, Ref(trendZig, -1), 2);
r1 = ValueWhen(f, Ref(trendMom,-1), 1);
r2  = ValueWhen(f, Ref(trendMom,-1), 2);

f = r1 > r2 AND p1 < p2;

sig = f AND NOT Ref(f, -1) AND trendMom > Ref(trendMom, -1); 

_N(str = "(" + period + ")");
Plot(trendMom, "RSI" + str, colorWhite);
Plot(sig * 100, "Sig", colorGreen, styleHistogram + styleThick + styleNoLabel);

// --------------------------------------------
// Divergence for SHORT
// --------------------------------------------

trendZig2 = Zig(H, numChg);

f = trendZig2 < Ref(trendZig2, -1) AND Ref(trendZig2, -1) > Ref(trendZig2, -2);

p1 = ValueWhen(f, Ref(trendZig2, -1), 1);
p2 = ValueWhen(f, Ref(trendZig2, -1), 2);
r1 = ValueWhen(f, Ref(trendMom,-1), 1);
r2  = ValueWhen(f, Ref(trendMom,-1), 2);

f = r1 < r2 AND p1 > p2;

sig = f AND NOT Ref(f, -1) AND trendMom < Ref(trendMom, -1); 

_N(str = "(" + period + ")");
Plot(sig * 100, "Sig", colorRed, styleHistogram + styleThick + styleNoLabel);