POOR PLATFORM

Hi! I just want to raised my concern regarding their platform. I created a demo account to practice my trading but as I checked it, there is a slippage in their candle chart. You can see that it happened to EURGBP pair between August 2 to August 3 chart with H1 time frame. I am bothered with how their platform works and give me doubts if I will still choose this to open a real account and trade my money. It can lead to a bad trades and get you lose because of its poor execution.