Stop Loss and I focus more on using the trend line. Because the trend line too can be used as a stop loss level with the reason that as long as the trend's not over the chart will always be in front of the trend line. So if the chart crosses the trend line, we can be sure the price will continue to move away contrary to our position. That's my way in determining the stop-loss that's usually used in trading however what must be considered is there must be a little distance between the stop-loss level and the reference to the stop-loss level so that there's no market which touching the stop-loss and so turns around.