Use OBV/Price to see a price adjusted by 'On Balance Volume' - (OBV), a that measures positive and negative flow, was developed by Joseph Granville and introduced in 1963.
The indicator, together with , provides good entry/ exit points.
In the chart note the exit point before the crash.
Also, note the "wedge" - a bit lees optimistic that the 'price only' for SPY .
study(title="On Balance Volume/Price", shorttitle="OBV/PRICE") src = close obv = cum(change(src) > 0 ? volume : change(src) < 0 ? -volume : 0*volume) plot(obv/src, color=blue, title="Price_OBV")