Now that you understand the tools at your disposal for your trading career, it is time to talk a closer look at what types of trading you can engage in. Ultimately, to be a successful trader, you will need to combine all these types of trading to maximize the amount of ISK you can make.
Inter-regional trading occurs when you focus on the availability of different goods in different parts of EVE. The most noticeable example of this is with ships. Amarr ships, for example, will be more popular and more readily available in Amarr space and therefore generally will sell cheaper than anywhere else. So you can purchase Amarr ships from Amarr space and then sell them, for example, in Caldari space where demand may be lower, but prices will be higher.
Inter-regional trading is the only time in which you do not want to use buy and sell orders. The markets of EVE are always changing, and you will want to take advantage of any profit possibilities as quickly as...