Help! EA programming.

i wrote a very simple EA i can backtest it on all products on the strategy test, but when i leave it on the live account it won't place an order on forex products. The confusing bit is it CAN place order on Oil, index or WTI. How weired it is!

i attached my EA below, can anyone have a look for me please? i assumed the problem is after 26/07/09, the broker changed the amount of digits after decimal point for all forex products. Could anyone here spend some time have a look please? Please give me some advice.

Thanks alot!

hey bubble.....

try ---->

if((LowerBoll-Ask)>=DB*Point)

if(Bid-UpperBoll>=DS*Point)

//----->> .....h

Hello Bubblepins,

OK a few things.

First, lets talk about this part of your code:

Why is this wrong? Well. LowerBoll and Ask are both going to resolve to variations of the price. Now look a this also in your code:

This is good because here you have 2 values. Firs the Bid price and then the stop loss. But the stop loss is a whole number. We need to transform this number into a decimal that would actually represent properly against the value of Bid and so you correctly multiplied times “Point” which gets that particular equation to work. You have to do every time you pair up values in an equation where one is the Bid or Ask price or the value of an indicator against a whole number.

Now lets revisit this: Just like explained above, you have 3 items in this equation. LowerBoll is the value of an indicator, Ask is .. well.. the ask price and DB. This DB is a whole number. So we have to change it to something that will match the other 2 values in the equation to get the proper result. That is why we have to multiply DB times Point in order to get that equation to work. The corrected code would look like this:

And in most cases this alone would work.

Now, lets talk about another item. Since a lot of brokers are switching to 5 digit pricing, It is best to code your EA accordingly. To do this, I will add a variable called “PipPoint” This variable will check to see if the EA is running on a 4 or 5 digit platform and will adjust accordingly at the beginning of operation. (it will only run once because it is in the ‘init()’ section.)

Then I simply use “PipPoint” instead of Point throughout the EA code as needed .... this way the 4 or 5 digit issue is handled seamlessly.

So now your code that started out like this... Was corrected to this.... And further improved to this.... I have added these bits of code into your original source code and re-posted it here for your review.

There is a lot more thins to say about your code but I can hardly keep my eyes open. If you started programming then that is the first step. Keep at it. When things don’t look like they will every work.. know this.. there IS a way to fix it. You just have to be patient and go through things slowly and methodically.

Tip: One trick that I use a lot when coding is the combination of the Print() function with the strategy tester. When there are equations that I want to make sure return the right value, I put a print command right after then telling the EA to print the result of the previous line, then when I run it on the strategy tester I can look at the bottom tab called “journal” while testing on Visual mode which is much slower than the regular back test. (otherwise the messages would scroll too fast.) So I use the logs to make sure what I coded works like I intended it to.



Hope this helps man. Keep coding!

Thanks alot for both of your replies, thank you for your time and efforts.

Platanero:

I placed the EA you did for me on the demo a/c for all day (27/08/09) of GB/USD M15, parameters are 0.002, 6, 6, 2, 2, 0.1. In this scenario, I don't really care if it would make profit or not (test purpose only).

The test result is totally fine, but it still does not place order in live trade (the Oil or WTI is ok). I tried to attatch a screenprint file to show you, but it is over the file limit.

Thank you very much again for your attention on this message.