Hello Joe,
thanks for pointing this out, I will fix it. It´s called drawdown and is absolutely normal. Remember that this is for the long term and can have drawdown phases of over half a year (as can be seen in the backtests). If your friend is concerned about this, he trades too high risk. The minimum holding time should be at least 1 year, as every year has been profitable so far.
Thank you,
Lorenz