Trade Types
 - Buy
  - Unrestricted, only restricted by your capital
 - Sell
  - Restricted by how many you currently have
 - Short (Type of Sell)
   - Selling a stock which you don't even have
   - Restricted by your margin
 - Cover (Type of Buy)
   - Buying to exit the debt that you created when you make a short sale
   - Need to have enough cash to buy stocks & need to have stocks you borrowed

 Order Types
 - Market
  - Place it now, goes through immediately
 - Limit
  - Say how long it is valid
  - Set threshold above which you want a certain thing to be sold
  - Triggers, but only executes within the threshold
 - Stop
  - Converts itself into market order immediately when condition is met