Does FIFO still trigger day trading? (using Robinhood)

External question — Personal Finance Stack Exchange Author: user105949 Original post: https://money.stackexchange.com/questions/135421 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. I am using Robinhood and wondering how day trading is triggered and how first-in-first-out (FIFO) selling order works. I bought GME stock yesterday and bought GME stock today. If I sell 1 GME share today, will it trigger day trading even though the GME stock that would be sold is technically the one I bought yesterday (because of FIFO)?