GUGU allows fractional share trading, so you can buy as little as $1 or 0.000001 of a stock. Or, you can use "limit trading", where the smallest unit is 1 share, and set the price you want to buy at.
Updated
GUGU allows fractional share trading, so you can buy as little as $1 or 0.000001 of a stock. Or, you can use "limit trading", where the smallest unit is 1 share, and set the price you want to buy at.
Updated