This is a strategy file for Chart Logic that displays the daily high/low lines on a chart.
These lines are drawn on the start of a new day. They're plural objects, so when you activate the strategy it will display the history of high/low lines for all previous days.
In working on this I discovered that there was a problem with how times were calculated for plural objects when the object's cycle was not the same as the current chart timeframe. This has been fixed in Chart Logic v1.3, so be sure you have this version or newer to use this stratey file, otherwise you'll get some really trippy lines on your charts.