This reserved word returns a numeric value representing the ID of the currently active trendline.
==TL_GetActive returns -1 if no trendlines are currently selected or were added to a chart yet.If an active trendline is removed from a chart then TL_GetActive returns -1.If an inactive trendline is removed from a chart then TL_GetActive returns the object ID number of the currently active trendline. == Usage ====
<syntaxhighlight>TL_GetActive</syntaxhighlight>
==== Notes ==== When * TL_GetActive should be assigned to a [[Variable|numeric variable]] or [[Array|array]] in order to determine if the reserved word performs its operation is performed successfully. In other words, trendline ID is returned. When a reserved word cannot perform its operationif the returning value of TL_GetActive isn't saved, it returns an error code's not possible to check whether or not the selection of the trendline succeeded.
==== Example ==== <syntaxhighlight>Value1=TL_GetActive;</syntaxhighlight>
Assigns the ID of the currently active trendline to the Value1variable. The variable to which the returning value is assigned can be a numeric variable or numeric array.
Value1 is any numeric variable or array.
Trendline reserved word should be assigned to a numeric variable or array in order to determine whether the reserved word performed its operation successfully or not.
[[Category:Trendline Drawing]]