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Which data provider/broker can deliver real time quotes including openbook for hundreds of symbols simultaneously. IB only delivers openbook for 3 symbols at a time, dtn doesn't have openbook at all. I'll appreciate any recommendation.

Thanks Steve and Pitufu, but still no definite answer. Does someone know better today? Maybe Don can refer to this issue. Thanks.

I also have a friend from Generic who told me he could use the nx for shorting the stocks from the list, I'm not sure he is right, maybe he got a quick fill to a limit order, I read that sell short orders are not acceptable for nx processing unless the stock has exemption from the rule. not...