Forex Broker mistake in my favor?

If broker made a mistake in my favor, do I need to let them know about it ?

Basically I had a pair with take profit set for 200 pips, and broker closed it at my set take profit, while the actual price was 150 pips above it. Shall it be my concern or deal is a deal ?

I bet they would not allow me to correct my error if I enter at wrong price... Should I ? :)

Are you using a "live" or "Demo" account?

Some possibilities on what had happened:
Some of these internet-platform brokers are "market makers". This means that these brokers dont actually "trade" your money, but instead creates enough buyers and sellers within their platform and mimics the real market within their company. So eventhough this your chart shows a different price....you really dont know whats going on within the broker's company. This is dangerous, avoid these brokers at all costs!

Some unresponsible brokers sets the quote price VERY VERY HIGH up than the real price just to earn more on spreads.

Also, some platforms are just really stupid and dumb.....im currently using gtf forex on DEMO account....their platform is not updated!!! I have to reload the software acouple of times to get the REAL price.

Or maybe you could also be using a DEMO account and the broker is trying to temp you to start a "Live" account.

either way......just keep your pips to yourself.