To do something on Buy/Short Signal in Scanner

AFL Programming
1

Hi ,

I am trying to open an exe, when the signal is generated by SCANNER(NOT BACKTEST).
I search a lot Internet but no luck was found.

Please help me.

2

@Tomasz

Please help me

3

Try ShellExecute !

4

Hi, thanks for your response. That function I know. But what is the main root of code? Can you please share the entire Afl code? For. eg. Let's take Buy and Sell on Crossover(50,200).

I don't know where to write ShellExecute();

5

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1 Like
6 
Buy = prev_FastEMA > (prev_SlowEMA*(1 + (BuyGap/100))) AND IsValidEntryTimeAndOpen;
BuyPrice = ValueWhen(Buy,O);
Sell = Cross(prev_SlowEMA,prev_FastEMA) OR Open <= 10;
SellPrice = ValueWhen(Sell,O);

Short = prev_FastEMA < (prev_SlowEMA*(1 - (ShortGap/100))) AND IsValidEntryTimeAndOpen;
ShortPrice = ValueWhen(Short,O);
Cover =  Cross(prev_fastEMA,prev_SlowEMA);
CoverPrice = ValueWhen(Cover, O);

Buy = ExRem(Buy,Sell);
Sell = ExRem(Sell,Buy);
Short = ExRem(Short,Cover);
Cover=ExRem(Cover,Short);

PlotShapes(IIf(Buy,shapeUpTriangle,Null),colorWhite,0,H,-45);
PlotShapes(IIf(Sell,shapeDownTriangle,Null),colorWhite,0,L,-45);
PlotShapes(IIf(Short,shapeDownTriangle,Null),colorYellow,0,L,-60);
PlotShapes(IIf(Cover,shapeUpTriangle,Null),colorYellow,0,H,-60);

This is the code. Tell me where to write ShellExecute(); If you know please help. I am new to AFL.

7

From your responses, your end goal is clear but not your intention.

For e.g., what that .exe does? Why do you even need to run an external .exe?

99.99% of stuffs can be achieved through AFL itself.

Carefully read:

8

The exe is the command line. It places the orders to the broker. I can also use InternetPostRequest(). But, I don't know how to verify the current BUY/SHORT signal. Actually, I don't know which code is required to capture the signal.

9

I would strongly recommend to do your experimentation with AlertIF instead of going full-on and sending orders to your broker.
The lack of programming knowledge would cost you $$$ if you blindly send orders without making sure that the code is correct.

Also AlertIf includes internal logic that prevents repeated orders to be sent

http://www.amibroker.com/guide/afl/alertif.html

For example if you do this:

if( LastValue( Buy ) )
{
   ShellExecute(....); // this would possibly execute MANY times (each time you run scan) and you would end up with multiple orders
}

If you are not using AlertIf you have to implement your own logic that preserves the STATE (using static variables).

You really need to LEARN a lot before you send orders directly to your broker. Recommended reading is entire UserKB
https://www.amibroker.org/userkb/

10

Okay. I am trying with alertif. I will share the result with you.

Thank You.
:slight_smile: