A trailing drawdown is a drawdown that is pegged to your positive account performance. That means that if you increase your profit by $1.00, then your trailing drawdown will also rise by $1.00. All rules, including trailing, use closed and open equity intraday.
For example, in a $25,000.00 account your starting trailing drawdown is $23,500.00.
On your first trade as you make $100.00 in profit bringing your account balance to $25,100.00. This correspondingly raises your trailing drawdown to $23,600.00.
This continues until your trailing drawdown reaches the starting balance of your account, or in this case $25,000.00, at which point the drawdown will no longer trail above $25,000.00.
You can check your current maximum drawdown in R | Trader Pro's Trader Dashboard by looking at the Auto Liquidate Threshold Value column. It'll tell you exactly what balance your account is liquidated at.
The trailing limit changes based on account type: https://www.earn2trade.com/gauntlet-mini