How to add a stop loss to a chart                                                                                   
Example - plot an automatic stop loss based on a strategy
This example shows a trailing loss for an activated strategy, note the blue lines on the chart are the trailing loss levels and they correspond to the start points of the strategy activated on the vote line. In  this example the strategy uses an ATR level as a trailing stop loss. The chart will display the loss method based on the strategy selected.
To get the stop loss to appear you need to modify the chart template you are using - in this example we are modifying the standard chart. Select >chart options and then select > Trades and tick the > Plot stops in the chart. This will activate the stops for the strategy used in the chart. See below.
 
Example - test how different stop loss systems would work when used in a strategy
In this example we will use the Draw a Signal tool which in the green triangle on the right in this example, if you click on it you can select > go long . Then double click on the chart under the price line where you would Buy the share. This will bring up an option screen (you may have less options than shown here). In this example we selected a simple Trailing Stop line, make sure the Units show ATR and you can change other options as required. See below.
You will find you can move the Buy green triangle to any position and see when the stop loss would be triggered in a strategy.