Standard disclaimer that I don't necessarily know what I'm talking about, but I moved mostly to cash (and MSTY) a little before the current drops. I decided to start reading about how to actually do some of this trading (crazy idea after messing around for a year or two and having mixed success/failure).
What I read gave some indicators for when a market has likely topped. One of the main ones was seeing a number of profit taking days (days where the trading volume is higher than average and prices are moving lower) over the course of 6 weeks or so. By my (amateur) read of the charts, we hit four or five profit taking days over January and early February. I think we're in for a correction here, and I'm planning on largely staying out of the markets for a little bit. I've done plenty of trying to catch a "falling knife", and I'm hoping to avoid that this time. If I'm correct and we enter a bear market for a while, the goal is to watch the indexes for a couple days in a row of positive movement with higher than average volume as the sign that things might be turning.