This post is a bit outdated....but I'm in this exact position right now.....i hate banking!
let the blockchain revolution grow
https://support.coinbase.com/customer/portal/articles/2892985-segwit-2x-faq
What if my buy order was in progress during the fork?
You will only receive B2X for the amount of bitcoin present in your account at the time of the fork. Pending BTC purchases at the time of the fork will not be granted any B2X.
For example, if you buy 1 BTC on November 16 with a bank account, this purchase will likely be pending for 5 business days as we wait for your funds to be transferred from your bank. In this circumstance, you would receive your 1 BTC after the fork, but would not also be granted 1 B2X.
Anyone else in this position?