Exactly how much to buy or sell is based on the dollar size of the trading account and the volatility of the issue. (trendfollowingmentor.com)
Remember, it's your results over a large sample size of trades that matters. (learntotradethemarket.com)
Brokers allow traders to use leverage to assist in increasing the available position size of each trade, while they have invested a small amount of capital. (avatradeko.com)