Given that performance is the best predictor of performance, it would be fruitful to have a thread of key measures of performance (aside from race results). Race results are great, but there are so many other factors, that it’s good to have other independent measures. Among others:
Yes, that is a good chart to use (and that your red line is down and right versus your blue line is always good to see, isn’t it!?).
I look at various time periods. Generally my red line is the last 42 days and I compare that against different training blocks / months / quarters / years.
I like the idea of a chart like that, but doesn’t the variability in HR kinetics (HR lag for a given power, variability from day to day) make it less precise?