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There simply will be no difference in fills across all brokerages on the underlying that Creating Alpha trades. This is not debatable, it is simple supply and demand, the liquidity is there. If someone has an order sitting for a CA fill even though it just filled at the other brokerage one simply needs to cancal the existing order and resubmit and it will almost always fill.

Based on feedback from our members over years, IB used to have superior fills compared to brokers like TOS, eTrade, Fidelity, Schwab etc. However, when those newer brokers (Tradier and tastyworks) started to operate, the fills reported by members are comparable to IB. I think the main reason is that unlike brokers like Fidelity or Schwab, Tradier and tastytrade are very options friendly. Overall, I don't think it's a zero sum game. With IB, you would pay around 20-25% of your account value per year. And IB is still considered one of the cheapest. If you can reduce it to just few hundred dollars with Tradier, that's huge. I wish I could switch - I wouldn't think twice.

@pboongird IV rank is intended to give you a feel for how high IV is at the moment in relation to the range the IV was in over the last year. It basically gives you the percentage value of where IV stands in this range at the moment (0 is the bottom or minimum of this range, 100% the top). Putting it in a formula you would write (actual IV - min(IV)) / (max(IV) - min(IV)) . Also option sellers like to look at this number much, since high IV rank indicates high option prices in relative terms. While it is quite intuitive and around since long, I think it gained much of its popularity with TastyTrade propagating its use.

And this is not unique with Tradier. I experienced it with IB many times. In fact, sometimes the offer might sit there for a while, and lowering it by 1-2 cents might get you a fill. Sometimes it helps to "play" with it few times.

Not the broker but the market maker and they wouldn’t. However, with so many exchanges they may be working one while your order was routed to another and sits unfilled. Canceling and resubmitting will restart the smart routing engine which will now recognize the order at the other exchange.

They indicate the 10GB as a limited time offer. And if you take it, you probably won't qualify for the 10% SO discount.

I'm often asked which tools I personally would recommend. I believe that ONE is the most essential tool to analyze, design, monitor and backtest different trades and strategies. ONE automatically keeps track of all adjustments and commissions throughout the life of each position giving you the cummulative profit and loss figure, allowing you to concentrate on developing and then executing the best trading decisions. CMLviz Trade Machine is an excellent tool for backtesting different strategies. Volatilityhq and chartaffair.com are also mostly backtesting tools, but are more tailored to our strategies. They provide tools for trading the Steady Options strategies. Those I believe are the three most useful and essential tools.