Total value of positions held any time this period as a fraction of current allocation (typically mark-to-market account value)
Notes
S.Usage counts every position held at any time during the period (including positions entered and exited on the same bar), so it is greater than or equal to S.Exposure, which counts only positions still open at the end of the bar.
Use Combined or Extern to obtain this value for all strategies or for a specific other strategy or StatsGroup.
