Why some of signal provider's equity chart have no past record?

 

I note some of signal provider (e.g. https://www.mql5.com/en/signals/137963), the signal start at Apr 2015, but the equity chart record is recorded from 10 Oct 2015 afterward. The past record is missing.

Why?

Does it mean that I can delete the past record in my MT4 account ? How?

 Thank you. 

Trading Signals for MetaTrader 4: FOREXSTAY LIGHT 1H NO STOP LOSS
Trading Signals for MetaTrader 4: FOREXSTAY LIGHT 1H NO STOP LOSS
  • 20.00 USD
  • 2015.10.15
  • SAAD ELDIN AHMED SAAD
  • www.mql5.com
ATTENTION:FOREXSTAY@GMAIL.COM IS YOUR ONLY WAY TO GET SUPPORT FROM FOREXSTAY TEAM , WE CANT ANSWER ON YOUR SIGNAL REVIEWS OR EA COMMENTS OR MQL5 PRIVATE MESSAGES , WE WILL ONLY SUPPORT YOU VIA OUR EMAIL FOREXSTAY@GMAIL.COM , THANKS...
 

Mql5 just show after the signal go to public. The past can not be shown. That is why dd is low. Many signal trade long but just go to public recently due to this.

Be careful.

Reason: