It depends on you lot size and the leverage . if you use high leverage and big lots the number of pips to double you account will go down and you will require more pips if you use low leverage and small lot size . the important thing is consistency in gaining profit. if it can consistently earn a profit, I sure do not need the time to double your account. yeh to har trader ki apni strategies par depend karta hey keh aap kitni lot se trading lagatey hain to apki money double ho sakti hey aur agar aap is main high lot se trading lagatey hain aur apko acha experience he to phir aa papni money ko double kar saktey hain.