I have Fidelity too. I am signing up with Schwab tonight so I can buy more even though the stop sign is up. Will take a few business days tho. Wish I had done this earlier in the week.
There is no need to sell any shares to meet your RMD requirement. All you need to do is transfer the shares from your IRA account to a regular account at Fidelity in the $ amount of the RMD you need to achieve. Fidelity will include the value of shares transferred in the amount they report to the IRS as taxable. It's actully pretty simple.