So I'm learning more about Candlesticks and Heiken Ashi and their relative merits and pitfalls. Any opinions of these relative merits are welcome btw.

But I have a specific question about charting these in excel. 

I have managed to get the formula for Close , High and Low all correct and agreeing with the rest of the world (I'm working on British American Tobacco (LON:BATS)).

I cannot get my Open figure to agree. 

I am using the very simple formula of (Previous Period real stock Open + Previous Period real Stock Close)/2. The average of the previous days open and close. This seems to be the accepted and published formula?

I've tried using various combinations of the real prices and the Heiken -Ashi prices.

This will not agree with the rest of the world.

Where am I going wrong?

Thanks

W.

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