Beginners avoid placing a stop-loss order because of the difficulty in striking a balance between two conflicting criteria – avoiding unnecessary triggers and preventing wider losses. If the stop-loss price is too close then there will be frequent losses with exits from even good entries. On the other hand, a stop-loss order far away from the entry point will result in rare but wider losses. The ideal stop-loss order should be the one, which would not cause a premature exit because of spikes but provides an early exit in case of a trend reversal.
I would suggest using the following tested methods to avoid premature stop-loss triggers:
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