Function of Nth highest function in AFL

[fxshrat]

@HelixTrader

Here’s one possible way to achieve it, although there may well also be a simpler approach out there.

1. Your code is wrong as it returns wrong values (see table below).
2. And yes, there is simpler way by just using Percentile function outputting correct values

function NthHV( array, period, nth ) {
    return Percentile( array, period, (period-nth) / (period-1) * 100 );
}

Period = 30;
HighestValue = HHV(H, Period);
NthHighest = NthHV(H, period, nth=2 );

Filter = 1;
format = 1.2;
AddColumn(H, "High", format );
AddColumn(HighestValue, "HighestValue", format );
AddColumn(NthHighest, "NthHighestValue("+nth+")", format );