Withdrew bitcoins but made money?

[kjrpat]

Hi.

I withdrew $4,560 from Bookmaker.eu today but received $4,612. (circle.com)

can someone explain how?


I know that bitcoin fluctuates.

so should I only withdraw money on days the bitcoin market is up? if so, what is the best website to monitor that movement.

the money entered my circle wallet in USD not coins.


please, somebody help me out here im so confused.

thanks,

James (first time poster)