Questions on objectcreate() and symbol()

I've got an EA that looks at several timeframes and currencies and then is supposed to plot trendlines on the stongest trending currency, provided a chart of that currency is open.

I've figured out how to determine if a chart of X currency is open, but how do I get objectcreate() to plot on the specific chart? I see several fuctions pertaining to windows, but none for charts.

Also the help files say that symbol() returns the symbol of the "current chart" but in actuality symbol() just seems to return the symbol that the EA is attached to. So is there a way to determine which chart I am actually looking at?

I'm afraid that there is no textbook way to accomplish this but I'm hoping someone has some creative ideas on how to acheive these things with mlq4.

Thanks.

Of course "current chart" must return the chart the EA or script is attached to! If this would return different things every time you "look" somewhere else there would be no way to write reliable EAs!

You cannot plot objects on other charts than the one you have the EA attached to. To solve your problem you could attach the same EA to every chart you want to monitor and do something like:

if (getStrongestSymbol() == Symbol()){
plot();
}

This will call getStrongestSymbol() more often than needed (once for every chart) but its the only way to do it the MT4 way of how things are done.

If getStrongestSymbol() is very expensive to calculate (what I doubt) you could make this function automatically cache its return value on disk or somewhere else (global variables can only hold numbers).