Yesterday I had the opportunity to watch this strange behaviour again (it is happeining constantly for my strategies). It is always the same pattern. The position goes into profit and on a new bar the stoploss is moved to breakeven on the first move. If the price then advances further in the direction of the trade (gets more profitable) the stoploss moves two times again, alays after exactly one minute. So it moves to breakeven on the new bar (this time it was 5 min bars), after exactly 1 minute in the bar the stop moved up 1 point, 1 minute later (two minutes after the new bar began) it moves another 0.5 points. Then it sits still for the rest of the bar. So the stop is always moving to the full minute. That makes me think that PRT does something every minute even for strategies that run on longer timeframes.
I tried to check with graph and the stoploss is calculated with 5 digits (1,XXXXX). The changes of the stoploss that happen within the bars one does not see in backtest with graph.