You should watch the VIX on a daily chart and note that the VIX is a measure of expected volatility in equities derived from activity in OEX options bid/ask.
A rising VIX tends to correlate with fear, and a descending VIX tends to correlate with complacency. The VIX is mean reverting, reflecting mean reversion in the market. When the VIX gets very stretched from a short term moving averaqe, then it usually reverts. In other words, it can be used as a contrarian indicator to anticipate bias. VIX extremes,like in July and October, coincided with intermediate term bottoms. It is a derivative sentiment indicator.
Today's closing VIX is stretched down, and is at multi month lows.
It has descended as the rally has continued. But it is now signaling a possible reversal, however it still did not reverse direction on a closing basis.
It won't help you directly with daytrading and scalping but it will help by being a component in whatever you use to determine a bias for the day. If the market sells down Monday, and sells hard,
you will see the VIX rise at least a few points, as people will get worried the rally is reversing, and institutions will be hedging their positions with options strategies.