IOTA to BTC on BITFINEX

By following the below steps one can sell your IOTA on BITFINEX.com

Make sure your IOTA are on the Exchange wallet - (on Bitfinex they have three dedicated wallets for each of the functions of the site - Exchange, Margin Trading and Funding) - you can instantly move your funds from one wallet to another on the Wallets page.
Go to the Trading page IOTA/BTC pair. And choose Exchange section (not Margin).
There you will need to specify the type of order, order size, and price if you choose "Limit" order type. If you choose "Market" order type, your order will be immediately executed at a current market price.
Click on the "Exchange Sell"
Your order will appear in the Orders tab.
Once the order is executed, your BTC will be credited to your Exchange wallet
The executed/canceled order will then move to the Order History tab.
After you have your BTC, you can go to the Withdraw page > Bitcoin and initiate a withdrawal.

Instructions withdrawals are here: https://support.bitfinex.com/hc/en-us/articles/115003291345-How-do-I-withdraw-cryptocurrencies-