Calling prices from Broker B history folder when logged into Broker A

 

I have two broker accounts in one MT4 installation. Can I use prices from Broker B when I am logged in at Broker A to create a custom indicator?

I have previously explained how I have been able to modify custom indicator(s) to utilize prices of any user selected security instead of default (current chart).

https://forum.mql4.com/53757

Let's assume I am logged into Broker A. With this indicator I can use any security listed by Broker A and have history file. [this is what it is meant to do, so it is good]

Now, what I want is to plot this indicator using a security at Broker B (i.e. in its history folder) while I am at Broker A.

I have tried moving history file from broker B to A and can see this in offline mode when I am at Broker A. I can make a chart in offline mode at Broker A but can't plot it as an indicator ( while I am on a chart from broker A).

How should I modify my indicator so that it will plot this indicator on a chart at broker A using either the prices in Broker B history folder (preferred) or read the offline file.

Appreciate any tip to accomplish this task.

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