This 30 min chart provides a very clear example of why the closing VWAP price is well worth putting up on today's chart. Also, in this example, the level from the day before is also shown. The market today made a very fast rebound from new move lows to get back up to those levels before selling off slightly before the close.
Also note that these two previous Close Vwap prices (magenta horizontal lines drawn from the closing Vwap prices) came close to the dynamic POC (Point of Control), which on this chart is the thin red dashed line. (The thick red line is the Dynamic POC for the entire chart, whereas the thin line is for this session only. The thick one changes depending on what you have displayed. I sometimes like to have a 30 min chart show today + yesterday, or today + rest of the week to compare with the current situation.
In today's example you can see that the thick line is down where the Vwap Close price for today is, making it that much more likely that the market will test that level on any pullback. It will also make an excellent level to put in a Limit Buy order in the expectation of a quick reflexive bounce back up. In ES terms I would expect at least a 2 point bounce but with this level of volatility probably more like 5-10 points, probably within 5 minutes. We will see tomorrow - or whenever that level is hit again once there is a pullback. Given the Ichimoku Clouds are heading down and price is well below, even after this dramatic bounce up, chances are very high that this level will be tested tomorrow. Shorting the market from where it has closed with an expectation of such a test is a fairly high percentage bet, albeit with current volatility, who knows what will happen. If the market does keep zooming up on the open, I expect it to zoom back down again to that closing Vwap level in short order. During high volatility situations there are usually huge moves up and down until the options situation calms down and a new bottom or top gradually becomes apparent - usually a 2-6 week process.)
Now also marked is today's closing VWAP price. If there is a selloff tomorrow, expect the market to test that level.
I have marked this 'beyond technical analysis' simply because VWAP, though a technical indicator, is derived from very different criteria that are 98% based on price action alone (moving averages, oscillators etc.), nor is it a 'chart pattern' per se.
I have seen these levels tested hundreds of times, sometimes days or weeks later if there is a strong move and now there is a correction underway back to previous levels. I find that the VWAP, along with the dynamic Point of Control in the Volume Profile (premium) indicator all I need to ascertain likely support-resistance levels.