The NBI.X hit the .5 retrace today two years from the July 20, 2015 high. The 3x leveraged ETF's for this item, LABD and LABU each printed a TDSEQ daily 13's Buy/Sell signals (buy signal for the inverse - sell signal for the 3x Bull) at the close today. The composite model line in a Hurst cycle analysis starting about 1/3 the distance up from the 2002 low using the nominal model shows a significant cycle high here. The hourly printed TD Sequential set ups at the close.
Worth some study.
A conservative entry would be to watch for a price flip, i.e. a close lower/higher than the 4 prior closes and then set the stop above the high.