TOS sold my QQQ C615 "The execution was the result of a margin sell-out"

**I DONT HAVE A MARGIN ACCOUNT**, this is a cash account and Im on a computer (re "Phone Sell"

I was in the money bought at .73, "sold" at 2.24
Account was not negative settled funds showed I had enough for 1 last trade of the day

I always close the position before the end of the day, this is the first time they ever did it for me