Many signals appear as 'new signal' but with a history of sometimes more than 6 months. However their drawdown history only shows from the new starting date which is often no more than a few weeks.
Why is the trading history present but the drawdown history not? And maybe the same applies to the deposit load?
Yes, this is a common problem with all signal copying platforms, they can't detect the real and live drawdown of alread closed trades of a signal, if they are connected with them at a later date than their creation.
Past trades data are coming from the trading account's history and are true (for most brokers that is), the only part of trading history that cannot be retrieved is the live/open drawdown of already closed positions.
I recommend asking for the Myfxbook Stats of the entire account history.
They are able to calculate the historical drawdown even in hindsight based on OHLC data.