AMEX:SPY SPDR S&P 500 ETF
I cloned the protractor that is showing and put a copy in the object tree. There is also a perfect inverted protractor in there. If you measure any distances with the circular (not elliptical arcs) they will agree with the arrow tool. It's strange but the same ratios that I used on the BTCUSD 1 minute are showing up at this scale on this chart. ?? Not really enough data to decide if the angles are satisfactory. Going long for less than a week, then short (on the red box) down cycle. Just click the arrow in the upper right of the chart if you want to "make it mine" and work with it.