Trading 5 or 10 lots a trade, 10 - 50 trades a month, letting 90 percent expire, rarely spreading, 500k account. IB?
up vote for ib because i trade futures options there. it is easy if you are just letting it expired rather than day trade.
$16,000 Spx is twice that as the contract size is double. Spx may have lower commissions though as it is a security option though I have not been able to confirm this.
I forget the reasons, but I'm doing ES over SPX. Have thought about full SP futures options, which I believe are only floor traded, but the size might bring down commission costs.
Full SP futures/options went away last year. https://www.cmegroup.com/education/...ndard-sp-500-futures-and-options-trading.html