The price of stock will immediately go up the same multiple as stock shares go down. If it's 9 day before, 9 x 5 the day of split. U would have 45 at $45.
You need to sell on the next pop and then read more about 3x leverages before trading this again. I'm not trying to be condescending, but the sooner you learn more about these and what they do, the less times you'll lose. If you want a good miner for long term, buy a company like AUY or Barrick. Decay doesn't affect them like it does with these. Just trying to give advice I wish I had gotten when I first started. Good luck!