EOD bid-offer data

daveb1

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Hi,

Does anyone know where I can find the EOD bid-offer spread for FTSE350 shares?

As far as I know the EOD OHLC prices given by data suppliers e.g. ADVFN, Yahoo, etc are mid-price and don't take into account the bid-offer spread. I'm writing some software to backtest a system but rather than using just the EOD mid-prices I'd like to make it more realistic and include the spread. I could add a fixed % across the board but the spread obviously differs from share to share.

Any ideas?

Thanks
Dave
 
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