To build "tick based bars" you must change the base chart to a CVB (Constant Volume Bar) and set it up to make consolidation not by Volume but by number of trades.
In CVB settings, switch Type to “Ticks Only” and specify a number of trades to consolidate in VolumeLevel. Popular settings would be 144, 233, 377, 610 and 987 tick charts.
This will create a chart that builds bars based on the total number of trades specified. Once threshold is met, a new bar is created.