Hi Trevor...TD is not your foe here, they are the Market Maker. It is their job to ensure there is shares available to make a market. A good MM can do wonders for a stocks share price in good and bad markets. To be honest with you now adays because of many brokers that use Anon, it is impossible to know who is friend or foe in the markets.
Never assume that shorts are a stocks foe. In fact often the opposite is true. Look at it like this, for every stock trade there is a sell and a buy to complete the transaction. A short just turns it around he sells before he buys. This is not a bad thing, it keeps a stocks share price in the realm of reality. Just as often as people that get caught buying a stock that goes down, the shorts get caught with a stock that goes up. If a stock only went up in share price no one would ever sell, making the stock illiquid to trade. People have to get over the fear of the shorters.
A perfect example is the shorts that are caught in FNC, the stock is a low volume trade, because no one is selling before news on the stock, the shorters are caught. They will have to pay a high price to cover their shorts.
I hope this explanation somehow helps with your fear of shorters. You have nothing to fear from this group but fear itself.
Al