TTS is gained from having over 4 trades per day for 4/5 days out of the week. MTM is something you would need to denote before april 15th 2020 for your 2020 retur (often sent in with 2019 return).
Track expenses on schedule C. For arguments sake lets say these expenses equal 10k.
Go to schedule D and put a 10k loss to balance out these expenses. Thus reducing the capital gains on schedule D.
Let me know if you have any other questions
