Well I'm curious. Any way you can ball park it for me or would I need to sign an NDA for that? Currently paying about $350/mo for market data, I do believe imbalances have significant additional value but I can't afford to go crazy on the data budget..
If you email me directly, I can send you the limits . I can't post this publicly. Keep in mind that Realtick Pro with API costs $425/Month plus Market Data.