What does “Proportional by equity” mean?

When you copy a Signal using the “Proportional by equity” option, this it adjusts the size of the trade in proportion to your account size relative to the Signal’s account size. This means you are taking a similar risk to the Signal you’re copying. If the Signal’s account size has 10 times more Equity than yours, and the signal opens 1 Lot of USDJPY, the app will open a trade 10 time smaller on your account (0.1 Lots).