Completely up to you based on two things-one how much you can afford to lose and two your risk appetite starting off. You need to be able to sit comfortably in drawdown without getting nervous or closing your position early
There is no limit to how much you can trade with other than your broker’s requirements. But yes, you must always start small when you are going live. You can choose an amount that you find suitable for trading as per the risk you wish to take.
You must always invest what you are comfortable risking because there is no limit to how much it should be. If your broker allows, you can trade with as low as $5 because the beginning of your trading career would be full of mistakes and losses that you must take lessons from.
In short what you can afford to lose but with that comes the stipulation that the amount you can afford to lose allows you to trade with proper risk management with the smallest lot size you can use (so 0.01 on standard accounts). If you are not able to do this then keep your powder dry and stay on demo until you can.
HIGH RISK WARNING: Foreign exchange trading carries a high level of risk that may not be suitable for all investors.
Leverage creates additional risk and loss exposure. Before you decide to trade foreign exchange, carefully consider your investment objectives, experience level, and risk tolerance.
You could lose some or all of your initial investment. Do not invest money that you cannot afford to lose. Educate yourself on the risks associated with foreign exchange trading, and seek advice from an independent financial or tax advisor if you have any questions.
Any data and information is provided 'as is' solely for informational purposes, and is not intended for trading purposes or advice.
Past performance is not indicative of future results.