Use to be 7x they lowered it after I made a rant on ET! Was charged $500 for one night. Thank god, I did make enough on the short to cover the fee. Perfectly timed the offering to be released the next day. Learned my lesson to never hold HTB overnight.
Also, I'd refrain from selling back locates until you're 100% certain you won't be needing them. They take it from you for a miniscule % of what you paid and just relocate it back to customers for instant profit. It's a shady business tactic!