Even with precisely the same indicators, there can be great differences between brokers and their platforms. The first obvious reason is that the price history is broker dependent, which can greatly affect the signals when using short time frames below 60 minutes. The second reason is that your 5 minute bars, even when based on the same price ticks, might start at a different time offset.

For testing this, compare the price charts and print also the highs and lows of the 5 bars belonging to the fractals, on both platforms. Then you can most likely see where the differences come from.