I have a mini account for testing trading strategies, for...

I have a mini account for testing trading strategies, for about 2 years everything went very well. Recently I faced a problem with some orders opened at unrealistic prices, followed by huge slippages for S/L. I completed a request for investigation, promptly and fairly they confirmed that the trades were erroneously opened due to AUDUSD spike and they refunded me. I stopped trading just because it wasn't suited, I mostly placed buy stop orders that were risky at spikes.