Hi Beibian,
It can also depend on the quality of your setups. 1:1 can work if you have a high win percentage, but I like to look for higher quality setups that can yield much larger rewards.
But always remember who is in control, and it’s not you. You take what the market gives you, not what you want. Sometime you get 1:0.5, sometimes 1:1 or 1:1.7666669.
I will direct you to my reply on similar thread here
Hope this helps.
Good luck!