EA or Script? Global vars?

Hi,
Ive got an app that Ive written that works fine.. (EA)

Ive got the following concerns..



1. This is a Hedge app that monitors 4 charts. I dont like the idea of running my ea on all 4, cuz they could step on each on each other.. Ive looked at using gloabal vars, as there are no built in Semiphores, mutexes etc.. into the system.

2. If I only monitor one chart, and its not fast moving, I might not get ticks often enough..


So, Im tempted to simply run a script in a loop , sleeping 500 ms on each loop.

Im mostly interested in what my profit for all trades are doing.. Not what each pair is doing.. Makes for a hard EA.


Any ideas??


Gordon
[email protected]

use IsTradeContextBusy

I'd write it as a script and loop while !IsStopped(), and I've recently done just this for someone who needed to monitor multiple positions across multiple pairs.

You mention use of a mutex, here's a code sample that describes setting a semaphore for access to global variables.

IsTradeContextBusy will only identify if an EA (or script) can interact with the server and submit orders, it won't do anything for you otherwise.

All that does is create a critical section around the trade routines.. but not the rest of the Start()

It can still conflict..

Ive decided to write a script..

Thanks!
Actually, thats what I did.. I created a global var.. I store the TimeCurrent() value in it..

I update this value in my working loop, about every 1000ms.

Then, when another iteration looks at it, if its fresh.. Then it disallows use..If its old, then it assumes its locked up, and allow it to proceed..

The script is much better.. Allows much better control.. Wondering why Ive ever done an EA.

Scares me to death that a user will assume that the robot is running, when in fact its locked up and missing trades..

This EA engine is real cludgy. Should at least be a "MultiInstance" var or something.. This global var thing stinks..

Gordon

You know what? I forgot to add the link that describes setting a semaphore.

http://docs.mql4.com/globals/GlobalV...SetOnCondition