Let us look at a practical example, on the charts there is an upward trend but after price crossed the pre-frankfurt hour high a bearish candle formed which shows a danger of reversal of trend just like the danger the bridge posed to the boat man. A way to manage this risk is to close the buy position (exit the boat), wait for price to close abover the red candle (cross the bridge on foot), then re-enter the buy position when it does( jump back into the boat). Hope this helps guys!