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    Automated Trading System for TD Ameritrade

    Why would TDA cut off API access when you upgrade to a PM account? Isn't PM account just a change of risk profile and margin requirement? I lost all my account history when I switched from TDA's TOS platform to the original TOS platform. I thought it was just a change of the client...
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    Automated Trading System for TD Ameritrade

    Why would TDA cut off API access when you upgrade to a PM account? Isn't PM account just a change of risk profile and margin requirement? I lost all my account history when I switched from TDA's TOS platform to the original TOS platform. I thought it was just a change of the client...
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    TOS Direct Access Routing

    There's a bit of terminology mix-up here. Direct access to a specific exchange like the BAT, CBOE or ISE etc..... Smart - the system picks, Direct - you pick. -pt
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    IB vs Thinkorswim RE: price improvement

    Not sure about price improvement. But apparently IB can fill each leg of a spread independently among different exchanges is a winner to me. The best price from one single exchange as opposed to across multiple exchange can be as wide as 0.03. That's a huge "price improvement" to me. -pt
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    TOS Direct Access Routing

    Anybody use thinkorswim's Direct Access Routing? I've always use BEST (Smarting Routing). Lately, I've been having trouble getting filled. After another filled failure today, I decided to give Direct a shot... For some reason, direct access is only available for single legged options, not...
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