The indicator will obviously jitter at each earnings, but it can nonetheless give a rough idea. I don’t see anything related to this metric in Yahoo or webull.
At each earnings you do get the EPS in Yahoo, as a little tick on the graph, but you only get as of today EPS in the table (like in finviz). The P/E metric is also interesting as a general comparison against other similar stock. Plus, the trend in time could again help in predicting the movement.
Would that be the kind of tracker you’d use?