Formula for Pivots and code in for Amibroker:
// Pivots - 4
rg = H - L;
p = (H+L+C)/3;
R1 = p + (p - L);
R2 = p + rg;
R3 = R1 + rg;
R4 = R2 + rg;
S1 = p - (H - p);
S2 = p - rg;
S3 = S1 - rg;
S4 = S2 - rg;
Plot(C,"Close",colorBlack,styleCandle);
Plot(p,"Pivot",colorWhite,styleBar);
Plot(R1,"R1",colorBlue,styleBar);
Plot(R2,"R2",colorBlue,styleBar);
Plot(R3,"R3",colorBlue,styleBar);
Plot(R4,"R4",colorBlue,styleBar);
Plot(S1,"S1",colorRed,styleBar);
Plot(S2,"S2",colorRed,styleBar);
Plot(S3,"S3",colorRed,styleBar);
Plot(S4,"S4",colorRed,styleBar);
Filter=1;
AddColumn(C,"Close");
AddColumn(R1,"R1");
AddColumn(R2,"R2");
AddColumn(R3,"R3");
AddColumn(R4,"R4");
AddColumn(p,"Pivot");
AddColumn(S1,"S1");
AddColumn(S2,"S2");
AddColumn(S3,"S3");
AddColumn(S4,"S4");