BTW, like most people I totally suck comparing to him, but I was in an $SPX options trade that would've made 5000%+ over a month ($15K on a ~$200 investment, though could be scalped at different levels). Then TDA forced me to close it due to too much long Vega. I feel so screwed when I reviewed its perfromance just now.
View attachment 334762
The only risk was in Vega, which was huge in Vega terms, but I didn't have any real serious risk according to my calculations.
Here is the risk chart as of today, after it's already $15K higher:
View attachment 334763
And here is one of the margin calls I got from TDA:
View attachment 334764
If I remember correctly, I might've had a similar trade at IBKR in the past without any issues, so I may trade those again there when opportunities show up.
Just won't dare to go in with huge size.
What's the composition of calls?