First Buy pop up not working

AFL Programming
1

Hi Gurus

I am working with Buy/Sell Pop up signal .
sometimes ,first buy signal(popup) is not working where as Alert for the same signal is working.
Please Help . Below is my code

_SECTION_BEGIN( "Main" );
_N( Title = StrFormat( "{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) ) );
SetChartOptions( 0, chartShowArrows | chartShowDates ); //Enable X-Axis (Date/Time Axis)

per = 0;
sec = 5;


Plot( Close, "Candles", colorDefault, styleCandle ); //Plot Candles

Plot( EMA( C, 20 ), "EMA20", colorYellow, styleThick );
Plot( EMA( C, 50 ), "EMA50", colorBlue, styleThick );
Buy=Sell=0;
Buy = Cross( EMA( Close, 20 ), EMA( Close, 50 ) );
Sell = Cross( EMA( Close, 50 ), EMA( Close, 20 ) );

PlotShapes( IIf( Buy, shapeSquare, shapeCircle ), colorGreen, 0, L, Offset = -10 );
PlotShapes( IIf( Buy, shapeSquare, shapeNone ), colorLime, 0, L, Offset = -20 );
PlotShapes( IIf( Buy, shapeUpArrow, shapeNone ), colorWhite, 0, L, Offset = -15 );
PlotShapes( IIf( Sell, shapeSquare, shapeNone ), colorRed, 0, H, Offset = 40 );
PlotShapes( IIf( Sell, shapeSquare, shapeNone ), colorOrange, 0, H, Offset = 50 );
PlotShapes( IIf( Sell, shapeDownArrow, shapeNone ), colorWhite, 0, H, Offset = -45 );


sellsignal = LastValue( Sell );
buysignal = LastValue( Buy );

BuyPrice = ValueWhen( Buy, Close );
SellPrice = ValueWhen( Sell, Close );

sellcount = 0;
buycount = 0;

AlertIf( Sell, "", Name() + " Sellprice=" + SellPrice, 2 );
AlertIf( Buy, "", Name() + " Buyprice=" + BuyPrice, 1 );

if(LastValue(Sell)!=0  AND sellcount == 0 )
{
    PopupWindow( "sellprice=" + SellPrice, Name(), sec );
    Say( "sell Order Placed" );
    buycount = 0;
    sellcount = 1;
}

if(LastValue(Buy)!=0 AND buycount == 0 )
{
    PopupWindow( "buyprice=" + BuyPrice, Name(), sec );
    Say( "buyOrder Placed" );
    buycount = 1;
    sellcount = 0;
}

_SECTION_END();
2

@baru,

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4

Just now did and got Verified Badge.
I am quite new to the forum , Thanks for the information .

Regards,
baru

1 Like
5

Study LastValue().

6

I am sorry to ask again.
Last value gives the current/last value of the array .
Like LastValue(C) = current bar -Close value .

I am getting all signals for few runs/symbols.
For few I am not getting only one signal(buy or sell).
Do I have to keep a Set Delay or some thing like that ?

Regards,
baru

7

See this to help you debug

How do I debug my formula? - AFL Programming - AmiBroker Community Forum

sellcount = 0;
buycount = 0;

This method of counting will not work because those are local variables and AFL executes afresh each time.
AmiBroker Knowledge Base » When and how often AFL code is executed?

So either you can use static variables or functions like SumSince() etc depending on how you are counting to maintain state.

8

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