even in the same broker (regulated) strange things have happened to me, for example in a computer the price reaches the candle, but in another computer the price goes in a different location to the candle (same broker, same account, but different computer )
For my part I do not see anything suspicious, the only suspect is that they use an unknown broker for a good system (VERY RARE)
Maybe for that case (same broker, different data) there is issue in MT4 client/network delay so some computer missing 'ticks' from broker.
But MT4 data can be 'REFRESHED' so All missing / different data will be RE-DOWNLOADED from broker, just try this in your MT4 that have different chart data on SAME BROKER. Just Right-Click on chart and click refresh, then all different / missing data will be updated.
After you do the refresh, please inform us in this forum, if you STILL have 'Different Chart on SAME Broker'.
FYI, FintechFx fake trading suspects are based on 'refreshed data' from Server, so it is IMPOSSIBLE to have 'bid' price that not in the chart,
If that transaction occurs, the chart data should follow that transaction data, and that bid price will be the 'High' price on the candle.