Trade different pairs from same window in ea?

I'm trying to figure out how to program my EA to trade multiple currency pairs for running in one window. Normally, I'd just open a different window for each pair and each timeframe. However, I've decided (somewhat last minute) to create an EA and enter it into the 2007 Automated Trading Championship. This seems like a good way to forward test an EA without needing to run my computer at home 24/7. It also gives me a definite timeframe, so I'll actually get off my ass and finish this thing ;-)

Anyway, I was thinking I'd just make an object for each pair/timeframe I plan on trading, and just run my instructions for each object.

Anyone else ever program something like this? Is the different objects a decent way to go?

-mrebersv-

Hmm...MT4 doesn't seem to allow defining a class. I figured it was just c++ with added functions and keywords, but apparently it doesn't allow OO. Anybody have another idea for this?

Just define your code in a function & call it in turn for each currency pair / timeframe combination

e.g for a moving average, use symbol=Symbol() & timeframe=0 for current chart, specify a different symbol & timeframe to calculate the ma on another chart

iMA( string symbol, int timeframe, int period, int ma_shift, int ma_method, int applied_price, int shift)
you would also need to use fully specified definitions like:
iClose( string symbol, int timeframe, int shift)
instead of Close[] (which accesses the current chart only)

Thanks for the reply. I know I can do it that way, but that requires me to make variables like ema_50_gbpusd_4h, ema_50_usdjpy_1h, etc. Instead of declaring variables for each pair-timeframe combination that my EA might trade, I thought it'd be nice to have an class that contains all the variables and functions (methods...whatever) that I would use, then just call gbp4h.ema50. That way, I only declare the variables once for the class, then I can declare an object and all 20 variables/methods will be declared inherently. Doing one entire set of variable declarations per pair-timeframe leads itself to a long, long list of variable declarations, not to mention that changing what pair-timeframes the EA uses isn't exactly quick and easy...more like long and tedious.

My current setup requires around 12 variables (6 if I used arrays...) per pair-timeframe combination. Therefore, if I want to monitor GBPUSD, GBPJPY, USDCHF, EURUSD, and USDCAD with one EA, I need to declare 60 variables. And that's only if I'm doing one timeframe for each. If I want to monitor 1h, 4h, and daily charts...now we're at 180!

With some sort of "class" or "struct" datatype (like c++ normally has), I can declare 12 variables of the class, then one class for each pair-timeframe combo. If I want to add a pair-timeframe combo, I only need to declare a new class (one line) and call my trading function for the new class in the start() funtion (a second line). Thus, changes becomes more manageable and code becomes more readable. Additionally, if I want to change what indicators or variables I use (say I wanted to add CCI...), I only need to change it in the original class declaration and make sure my trading function uses cci, now. Without a struct or class datatype, I need to make changes for each pair-timeframe combo.

If anybody knows some way to do something like this, please chime in! I'd rather not have to manage so many damn variables!

-mrebersv-