Hello Simon,
Now here is what I see from the pictures:
1. On your MT backtester, the journal shows an error. It should not be from the small money you have inside. You can set the trading amount to start the backtest. For sure it a big number. About that, you should connect your broker, and ask why a backtest could not be completed. Are you sure they allow algorithmic trading on this live server?
2. The Historical data looks alright, but it is too small. Did you try to get more by pressing the Home key? If you look at your strategy, it has less then 100 count of trades which is really small.
3. The spread is big! You should look for brokers with a smaller spread. With GBPNZD it should be about 2-3 pips. You have 7. Even you do everything right, wich such spread, you will hardly see profits into your account ever.
I would suggest you give it a try with another broker with smaller spread and more Historical data. I am sure, this way you will do it all properly.
Kind regards,