The equity percentage cannot be used to evaluate true system performance.
This is the myfxbook info on my system8 (updated today)
Abs. Gain: +9.81%
Highest: (Nov 15) €1247.45
This is the info from oanda
Unrealized P&L 3,946.64
Unrealized P&L% 316.41
Net Asset Value 5,193.52
Looking at myfxbook numbers, it is not easily seen that the system is in fact up 300%+ on open positions
Net asset value is 5193, balance is 1247
A very close estimate of the NetAssetValue could (with some effort) be calculated from open positions from last retrieval, if you store the current forex value of the positions held, as of the time you got data from the broker.
Going forward, you could actually graph balance and net asset value in a third graph, with 3 lines, one balance, one value of open positions, and one the sum of the two. You would need to store NAV each time you fetch data from the broker.
While writing my system8 grew to 5197 happy days lol
knowledge as well as smarts are needed to make money.