Many people say you should set a stop-loss for each trade, and that the maximum loss you should accept if your stop-loss is hit is 2%. some people say 1%.
Its a good rule but knowing this on its own ignores some important issues -
Where is your stop-loss?
The closer your stop-loss is to your entry, the more likely it will be hit. Set the stop-loss at a price level identified by the TA, which will mean your trade is very unlikely to make a profit if this level is hit. Remember to take account of the volatility of this market
How strong is your strategy?
You should have trialled your strategy so that you know this trade is more likely to be a winner than a loser. Or that this sort of trade is eventually likely to be a very big winner, even if that is not the most common result.