Which software companies develop proprietary software in the trading industry? Thanks.
Or put it another way: what trading tool market makers use for their trading? I do not think market makers can use IB TWS manually to do their job.
I tried your way, it never got filled close to middle price. I used IB JAVA API code and got filled a shy of middle price by couple cents. Now, I...
I want to buy spy option and sell voo option (with the same expiration , strike , all call, and quantity) at the same time. No trading platform...
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