This indicator reads a comma‐separated values data file that contains support and resistance line data, and then plots those lines on a chart. Lines have a start time, an end time and a price. An empty end time means the line is still active and continues to draw as the chart progresses. There are some additional "type" values for each line that can be used programmatically.

The indicator does not analyze and determine where the lines should be, it just gets them from the data file and draws them on the chart. One of its intended uses is to set support and resistance lines in one place and use them from multiple charts. Given that the lines have an end time, this can support historical analysis as well.

From code, you can get the nearest support and resistance lines to a passed in price at a passed in time. Also N lines away from said price.

Detailed description and data entry template available at the launchpad site here.