Rather than creating your own excel journal, find an online ready and free journal, that will be much superior and professional. E.g. go to myFXbook, register and connect your account there. They support several brokers and the journal is automaticely getting updated with the infos from your trades. Otherwise, you can open e.g. a paper OANDA account (it's free and not time-limited) and connect it to OANDA. And it would even better, if you have an account at TradingView (it's way better in my opinion than mt4) and you connect your oanda account with TradingView and onda with myFXbook. You 'll have a very comprehensive journal with many useful statistics (actually all you need for backtesting you strategy and evaluating the future of your account).
Cheers and trade safe!