r/LETFs – M1 finance

I was going to create a HFEA portfolio after opening a new M1 finance account. So while setting it up I realized that it only allows 2 trading times: 9:30am for standard and 3pm for upgraded account. Does anyone have a problem with

  1. lack of freedom as to when to buy/sell 2) the particular time windows

and why/why not? Thanks