What lot size can I trade with $10?

Excuse me, could you please clarify what kind of trading you're referring to? However, in general, the lot size you can trade with $10 will depend on the specific asset, the exchange you're using, and any leverage or margin available to you. Some exchanges may offer micro or nano lot sizes that could potentially be traded with such a small amount, but it's important to carefully consider the risks involved before trading with small amounts of capital. Is there a particular asset or market you're interested in trading with this amount?