Can market makers see stop-loss orders?

Entering a stop loss order with your broker will automatically generate a sell order should the stock drop to that number. A market maker can see that number and may drop down to buy your stock at the low price and then resell it for a profit.

Can the market see stop orders?

For example, if you want to buy an $80 stock at $79 per share, then your limit order can be seen by the market and filled when sellers are willing to meet that price. A stop order will not be seen by the market and will only be triggered when the stop price has been met or exceeded.