Hi @PGAmbrosio, I have been using Tradier with TradeHawk for almost a month and am quite happy with it. For many SO trades, especially calendars and low priced straddles/strangles, the commission advantage is unbeatable. Just a few things: Tradier does not have a mobile platform at this point. Also they don't support calendars (spreads with same expiration are okay) on cash settled products (SPX, VIX, RUT etc.). So I maintain my IB account and do such trades there. So far, I have not seen any fills/liquidity issues. We've had a few glitches with the platform but I have seen those with all other platforms I have used as well. Good luck!!