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N line break for Amibroker (AFL)

Rating:
3 / 5 (Votes 4)
Tags:
amibroker, price chart

After Steve Nison’s book: Beyond Candlesticks, Chapter 6: three line break charts
Option 1: turn time axis on/off, Option 2: N-line break instead of 3-line break

Screenshots

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Indicator / Formula

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procedure constructChart_proc(nBar)
{
    global lBeginTime;
    global lEndTime;
    global lBeginNoTime;
    global lEndNoTime;
    global j;
 
    lBeginTime[ 0 ] = C[ 0 ];
    lEndTime[ 0 ] = C[ 0 ];
    lBeginNoTime[ 0 ] = C[ 0 ];
    lEndNoTime[ 0 ] = C[ 0 ];  
    lastHigh = C[ 0 ];
    lastLow = C[ 0 ];
    numUp = 0;
    numDn = 0;
    j = 0;
 
    for ( i = 1; i < BarCount; i++ )
    {
        // 1) trend change up
        if ( C[ i ] > lastHigh AND numDn >= nBar AND numUp == 0)
        {
            numDn = 0;
            numUp = numUp + 1;
            j = j + 1;
 
            lBeginTime[ i ] = lBeginTime[ i - 1];
            lEndTime[ i ] = C[ i ];
             
            lBeginNoTime[ j ] = lBeginNoTime[ j - 1];
            lEndNoTime[ j ] = C[ i ];      
 
            lastLow = lEndNoTime[ j - 1 ];
            lastHigh = C[ i ];
        }
        // 2) trend up continuation after downbar
        else if ( C[ i ] > lastHigh AND numDn > 0 AND numDn < nBar AND numUp == 0)
        {
            numDn = 0;
            numUp = numUp + 1;
            j = j + 1;
 
            lBeginTime[ i ] = lBeginTime[ i - 1];
            lEndTime[ i ] = C[ i ];
             
            lBeginNoTime[ j ] = lBeginNoTime[ j - 1];
            lEndNoTime[ j ] = C[ i ];      
 
            lastLow = lEndNoTime[ j - 1 ];
            lastHigh = C[ i ];         
        }      
        // 3) trend up continuation
        else if ( C[ i ] > lastHigh AND numDn == 0 )
        {
            numDn = 0;
            numUp = numUp + 1;
            j = j + 1;
             
            lBeginTime[ i ] = lEndTime[ i - 1];
            lEndTime[ i ] = C[ i ];
             
            lBeginNoTime[ j ] = lEndNoTime[ j - 1];
            lEndNoTime[ j ] = C[ i ];      
                     
            if (numUp >= nbar)
            {
                lastLow = lEndNoTime[ j - nBar ];
            }
            else if (numUp < nBar)
            {
                lastLow = lastLow;
            }
            lastHigh = C[ i ];
        }  
        // 1) trend change down
        else if ( C[ i ] < lastLow AND numUp >= nBar AND numDn == 0)
        {
            numUp = 0;
            numDn = numDn + 1;
            j = j + 1;
 
            lBeginTime[ i ] = lBeginTime[ i - 1];
            lEndTime[ i ] = C[ i ];
             
            lBeginNoTime[ j ] = lBeginNoTime[ j - 1];
            lEndNoTime[ j ] = C[ i ];      
 
            lastLow = C[ i ];
            lastHigh = lEndNoTime[ j - 1 ];                    
        }  
        // 2) trend down continuation after upbar
        else if ( C[ i ] < lastLow AND numUp > 0 AND numUp < nBar AND numDn == 0)
        {
            numUp = 0;
            numDn = numDn + 1;
            j = j + 1;
 
            lBeginTime[ i ] = lBeginTime[ i - 1];
            lEndTime[ i ] = C[ i ];
 
            lBeginNoTime[ j ] = lBeginNoTime[ j - 1];
            lEndNoTime[ j ] = C[ i ];      
 
            lastLow = C[ i ];
            lastHigh = lEndNoTime[ j - 1 ];                
        }  
        // 3) trend down continuation
        else if ( C[ i ] < lastLow AND numUp == 0 )
        {
            numUp = 0;
            numDn = numDn + 1;
            j = j + 1;
             
            lBeginTime[ i ] = lEndTime[ i - 1];
            lEndTime[ i ] = C[ i ];
             
            lBeginNoTime[ j ] = lEndNoTime[ j - 1];
            lEndNoTime[ j ] = C[ i ];                  
             
            if (numDn >= nbar)
            {
                lastHigh = lEndNoTime[ j - nBar ];
            }
            else if (numDn < nBar)
            {
                lastHigh = lastHigh;
            }
            lastLow = C[ i ];
        }  
        // no break
        else if ( C[ i ] >= lastLow AND C[ i ] <= lastHigh )
        {
            lBeginTime[ i ] = lBeginTime[ i - 1];
            lEndTime[ i ] = lEndTime[ i - 1 ];
        }  
    }
}
 
// code by E.M.Pottasch, 11/7/2010, N line Break Charts
// After Steve Nison's book: Beyond Candlesticks, Chapter 6: three line break charts
// Option 1: turn time axis on/off, Option 2: N-line break instead of 3-line break
SetBarsRequired( sbrAll, sbrAll );
 
nBar = Param( "nBar", 3, 2, 10, 1 );
constructChart_proc(nBar);
 
Title = Name() +
" |  " + EncodeColor( colorYellow ) + nbar + EncodeColor( colorWhite ) + " Line Break";
 
chartType = ParamToggle("Show Time Axis","show|hide",0);
if (chartType)
{
    GraphXSpace = 5;
    SetChartOptions( 0, chartShowDates );
    Plot(C, "\nTLB", colorWhite, styleBar);
    C = lEndTime;
    O = lBeginTime;
    H = IIf( C > O, C, O );
    L = IIf( C > O, O, C );
    Plot(C,"", colorWhite, styleCandle);
}
else
{
    delta = BarCount - 1 - j;
    lBeginNoTime = Ref(lBeginNoTime,-delta);
    lEndNoTime = Ref(lEndNoTime,-delta);
    C = lEndNoTime;
    O = lBeginNoTime;
    H = IIf( C > O, C, O );
    L = IIf( C > O, O, C );
    Plot(C,"\nTLB", colorWhite, styleCandle);
}

1 comments

1. Muralikrishna

hi Empottasch sir, this afl looks very interesting, it would be helpful to all if you explain in detail about this afl.

thanks in advance,
Murali krishna

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