[amibroker] PREV of MS in AmiBroker

[Yves <yltech@xxxxxxxxxxxx>]

I?m try to translate this formula(Metastock) in Amibroker(AB)

(C>HautP AND C>BasP,5, If(C<BasP,0,PREV))

A guy from AB said to use the loop.

I?m use a formula on site Internet of AB(Percentage Trail Stop)

Why when I?m use my Formula, I?m obtain :

Error 6. Condition in IF, WHILE, FOR statements has to be Numeric or Boolean type. You can not use array here, please use [] (array subscript operator) to access array elements

And when I?m use the formula Percentage Trail Stop,

I don?t obtain ERROR 6 ?????????????

WHY ???????

Thank

YLTech

Percentage Trail Stop

My Formula

StopLevel =Param("Percentage Trail Stop",0.05, 0.01, 0.6, 0.01 ); LK=50; FF=10; A1= IIf( L> Ref(HHV( Close,LK),-5), 1, 0); A2= Sum( A1, LK ) ; A3= IIf(C>0, FF, 0); Buy = Cross(A2,A3); Sell = 0; trailARRAY = Null; trailstop = 0; for( i = 1; i < BarCount; i++ ) { if( trailstop == 0 AND Buy[ i ] ) { trailstop = High[ i ] * (1-stoplevel); } else Buy[ i ] = 0; // remove excess buy signals if( trailstop > 0 ) { trailstop = Max( High[ i ] * (1-stoplevel), trailstop ); trailARRAY[ i ] = trailstop; } if( trailstop > 0 AND Low[ i ] < trailstop ) { Sell[ i ] = 1; SellPrice[ i ] = trailstop; trailstop=0; } } PlotShapes(Buy*shapeUpArrow,colorBlue,0,Low); PlotShapes(Sell*shapeDownArrow,colorRed,0,High); Plot( Close,"Price",colorBlack,styleBar); Plot( trailARRAY,"trailing stop level", colorRed );

_SECTION_BEGIN("Cr.HautP."); TimeFrameSet( inDaily ); // switch now to Daily HautP= Ref(H,-1) ; BasP= Ref(L,-1) ; TimeFrameRestore(); // restore time frame to original StopLevel = BasP ; Buy = Cross(C,HautP) ; Sell = 0 ; trailARRAY = Null; trailstop = 0; for( i = 1; i < BarCount; i++ ) { if( trailstop == 0 AND Buy[ i ] ) { trailstop = HautP ; } else Buy[ i ] = 0; // remove excess buy signals if( trailstop > 0 ) { trailstop = Max( HautP, trailstop ); trailARRAY[ i ] = trailstop; } if( trailstop > 0 AND Low[ i ] < trailstop ) { Sell[ i ] = 1; SellPrice[ i ] = trailstop; trailstop=0; } } PlotShapes(Buy*shapeUpArrow,colorBlue,0,Low); PlotShapes(Sell*shapeDownArrow,colorRed,0,High); Plot( Close,"Price",colorBlack,styleBar); Plot( trailARRAY,"trailing stop level", colorRed ); _SECTION_END();

 

 

 

 

Merci
 
YLTech ( Yves L. )
 
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