Retirement tax questions

bwa, I haven't registered sole proprietorship...I don't have a fiticious business name.  extensive day trading on daily basis automatically puts me in as sole proprietorship?

What can I do to write off carry over capital losses completely?  At first, I thought M2M election will take care of it.

Assuming M2M election is done for 2016 year, can I write off 2015 day trading losses?  If I end up with capital losses again this year, in 2017, can I fully write off 2016 capital losses in day trading?  

Thanks again!