Code for Maximum trade

[blessdee]

who can give me a code to allow EA to trade more than one pair but not identical pair. For example, it should allow only one per pair but can take up 

[William Roeder]

No code needed

Do not trade multiple currencies in one EA.

• You can't use any {MT4: predefined variables, MT5: predefined variables,} can't use the tester, must poll (not OnTick,) and usually other problems, e.g. A problem with iBarShift - MQL4 and MetaTrader 4 - MQL4 programming forum - Page 2
• You must handle History {MT4: 4066/4073 errors: Download history in MQL4 EA - MQL4 and MetaTrader 4 - MQL4 programming forum , MT5: Timeseries and Indicators Access /  Data Access - Reference on algorithmic/automated trading language for MetaTrader 5.}
• Code it to trade the chart pair only. Look at the others if you must. (Don't assume that Time[i] == iTime(otherPair,TF, i) always use iBarShift.)
• Then put it on other charts to trade the other pairs. Done.

[Marco vd Heijden]

It's perfectly possible to trade ALL instruments from just one EA.

You would have to check whether there already exists a position with the instrument you want to order.

There are several ways to do this, but unfortunately, you did not specify a terminal.

[William Roeder]

Marco vd Heijden: It's perfectly possible to trade ALL instruments from just one EA.

I didn't say it wasn't. It just overly complicates the code, with the reasons given.

Why write unnecessary code? Put it on multiple symbols to trade multiple symbols.

[Marco vd Heijden]

whroeder1:

I didn't say it wasn't. It just overly complicates the code, with the reasons given.

Why write unnecessary code? Put it on multiple symbols to trade multiple symbols.

I didn't say that you said it wasn't but it was related to this:

whroeder1:
Do not trade multiple currencies in one EA.

I Have been doing this for many many years and i would not even consider to code single instrument robots.

It brings many advantages, one robot that scans all instruments is so much different from (primitive) single instrument robots.

I certainly wouldn't call it unnecessary, rather a bitter necessity.

And i don't think you can escape it at some point, especially when you want to do comparisons between instruments, which is a lot easier in just the one robot.

So i don't know what to make of it really, i do not see any advantage, i do see many drawbacks however.

[William Roeder]

Marco vd Heijden:

I Have been doing this for many many years and i would not even consider to code single instrument robots.

It brings many advantages, one robot that scans all instruments is so much different from (primitive) single instrument robots.

And i don't think you can escape it at some point, especially when you want to do comparisons between instruments, which is a lot easier in just the one robot.

So i don't know what to make of it really, i do not see any advantage, i do see many drawbacks however.

1. To each his own.
2. Scanning is not trading. Your scanning code is the same in a single pair robot or a multiple pair robot.
3. Each approach is "one robot" There is no difference there.
4. There are no drawbacks for a single pair. There are for a multi, as I previously posted.
   

[Marco vd Heijden]

No, you are wrong.

No matter how much points you 12345678890