Can you also buy and sell bro in the market directly ?

Yes you can do that here - https://hive-engine.com/?p=market&t=BRO

Is there a minimum number of day you need to delegate ?

No , nothing of that sort .

You provided your earning but how much delegation have you done ?

I have mentioned the delegations in post too , first section .

Mainly you should be looking for APR portion , that is what matters .

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