Leveraged ETFs are prone to BOT behavior. They often have periods of stability and then periods of volatility. Usually there are several spikes in these periods of volatility. Finding short term tops during the volatile periods can be very rewarding. Here's a few ETFs that are in volatile phases right now:
Another one to keep track of is JPNS (Direxion Daily Japan Bear 3X ETF) due to recent sharp falls in the Nikkei. This ETF hasnt been around long enough to have a chart with spikes but would probably look interesting if it had.