Up and down capture
What share of the market's rises — and of its falls — you took.
How it is computed here
The chained return on the days the index rose, over the index's own return on those same days; and the mirror image for its falling days.
Worked example
This one compares the portfolio with an index you choose, and the demo portfolio has none set — so there is no honest example to show here. On your own portfolio, choose a benchmark on the dashboard and it appears.
Where it misleads
The pair is the whole point. 110 up and 110 down is leverage, not skill; 95 up and 70 down is what actually compounds.