Backdoor Roth IRA: Avoiding Pro-Rata Rule

Hi,

 

I have a question, and would like to get insights from here.

 

On 2019 Jan 1st, I held some traditional IRA balance $5000 funded from pre-tax 401K rollover. I liked the backdoor Roth IRA trick, but I was aware of the pro-rata rule. So in 2019 I did not contributed after-tax $6000 to the traditional IRA nor did I convert the traditional IRA to Roth IRA. But since I was aware of the pro-rata rule, on 2019 Oct 1st, I did a reverse rollover from my traditional IRA to the pretax 401K plan.

 

So on 2020 Jan 1st, I had no traditional IRA balance. Now my question is: can I contribute to 2019 traditional IRA on 2020 Feb 1st and convert to the Roth IRA 2020 Feb 2nd, without triggering pro-rata rule? The assumption is that, in 2020, I'll not contribute any pretax fund to traditional IRA.

 

Am I doing this wrongly, or it's just working fine?

 

Thanks!