I would not sell IndexNavigator because I make money using it myself and have invested a lot of time developing a strategy that is not based on risky tactics like almost all publicly available algos. However, if you want to observe how IndexNavigator trades and profit from it, that comes at a price.

IndexNavigator operates with high leverage, which classifies it as a high-risk strategy. However, the algorithm avoids martingale strategies and other high-risk tactics that could result in above average drawdowns or losses during market downturns. The algo employs a strategy that can involve significant daily drawdowns or losses, as it is designed to be drawdown-heavy. However, every position is protected by a server-side stop-loss, ensuring that losses are always limited. While the strategy may experience notable fluctuations on a daily basis, its performance should be assessed over a longer timeframe, such as monthly or quarterly, to gain a clearer perspective on its effectiveness.

The cTrader Copy platform calculates positions with regard to account size (see equity-to-equity ratio). If you have a small account (less than 1000 USD), make sure your broker provides microlots in indices (like 0.1 lots in DAX). Otherwise, positions opened by the algo might be too big for your account.