what is the difference between a limit order and a stop limit order 
a limit order is an order requesting the purchase or sale of securities should a specific price be met a stop limit order builds one additional layer that requires a specific price be met that is different than the sale price for example a limit order to sell your security for 15 will likely execute when the market price reaches 15 alternatively a stop limit order can be placed to sell your security for 15 only if the share price has dropped from 20 to 16 