How do I convert MT4 data into MT3?

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Hello,

I found out that MT4 use different value as MT3 - in terms of the price, MT4 use bid and MT3 use mid number. Is there a way that I can convert MT4 data into MT3 data??(any script) Or is there a way that I can change MT4 into using mid number as MT3??

The reason is because my method can work in MT3 but not in MT4....
Thank you.
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