This feature is available only in NeedForTrade Studio.
There are two deffierent types of strategies. See Strategy Types.
See Creating a Strategy to create a new Strategy.
See Editing a Strategy to edit an existing Strategy.
See Deleting Strategy to delete a Strategy.
There are some common strategies and backtesting properties that are global to a chart. See Chart Properties.
To understand the process of calculation of analysis techniques, please read Analysis Techniques Calculation topic.