Creating a stop-loss order

I recently purchased 4.4 shares of Microsoft at $220.30. After the purchase, I attempted to create a stop-loss order. I clicked ‘SELL’, chose the ‘STOP’ tab, and entered my price as $200.

However I am unable to specify the number of shares as 4.4. It only allows me key in a whole number. Is this a limitation?

You can buy/sell fractions only by market orders.