you can get OI from nearly every interactive chart provider. Or did I get your question wrong?

Hi Palais, thanks for your reply. Ironically, I was just looking at Barchart.com for OI and just trying to figure out how to get it up on a chart. Have you any ideas?

Oh you mean get the data on your stand-alone software? If you have no data feed? Maybe you should try to get historical .csv from yahoo finance or elsewhere. Sorry, that's all I can say. Normally you have OI in any data package and chart it in every way you like.

Palais Brongniart 

Oh you mean get the data on your stand-alone software? If you have no data feed? Maybe you should try to get historical .csv from yahoo finance or elsewhere. Sorry, that's all I can say. Normally you have OI in any data package and chart it in every way you like.

Many thanks, Palais. I shall keep trying!