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SUPER TREND indicator by Olivier Seban coded for Amibroker (AFL)





In this blog I will share with you some of my software for quantitative trading. Actually I am using Amibroker 5.60, so this software is written in AFL (Amibroker Formula Language).


The first one is the indicator named SUPER TREND by Olivier Seban:

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function SuperTrend( Periods, Multiplier )
{
    AverageTrueRange = ATR( Periods );
    MedianPrice = ( H + L ) / 2;

    UpBand = MedianPrice + Multiplier * AverageTrueRange;
    DnBand = MedianPrice - Multiplier * AverageTrueRange;

    ST = Null;

    Direction[0] = 1;//just to initialize

    for ( i = 1; i < BarCount; i++ )
    {
        // Begin Direction calculation
        if ( Close[i] > UpBand[i-1] )
            Direction[i] = 1;
        else
            if ( Close[i] < DnBand[i-1] )
                Direction[i] = -1;
            else
                Direction[i] = Direction[i-1];
        // End Direction calculation
        // Begin SuperTrend calculation
        if ( Direction[i] == 1 )
        {
            if ( DnBand[i-1] > DnBand[i] )
                DnBand[i] = DnBand[i-1];

            ST[i] = DnBand[i];
        }
        else
            if ( Direction[i] == -1 )
            {
                if ( UpBand[i-1] < UpBand[i] )
                    UpBand[i] = UpBand[i-1];

                ST[i] = UpBand[i];
            }
        // End SuperTrend calculation
    }
    return ST;
}

To download the afl script click here.

If you want to have a SuperTrend charted with two colors, you can read "How to color an indicator"

If you find useful this post, please leave a comment, thank you
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