First off, not a day trader. But read your posts everyday. I am a retiree and do invest in the market. I have made, lost and made money again as I am learning.
This is how I see it.
If I went into most business I would have large over heads.
To open the door before first customer arrives, I would have to pay up front. Shop rent,insurance, wages, advertising and etc.
So when I take a loss, it's just rent money this week.
I look at what I have made as to my progress.
I look at my loss/cost and see if I can reduce it.