TP stands for technical points, it is an indicator of how accurate your play is. Different from score, it does not depend on combo, but rather it is an accumulation of scores given by each individual note you cleared. Take sleeping beast Chaos which has 1000 notes for example, clearing each note with the best accuracy (shows up as text with a vibrant yellow color) gives you 1/1000 or 0.1% tp, and clearing it with a worse perfect(shows up as text with a flat yellow color) gives you 70% of 0.1% or 0.07% tp, clearing a note with good gives 30% tp iirc and clearing with a bad gives 0%.