The idea of VAASTU is to controlling ones emotions, anger and helps bring in positive vibrations, constructive decision making
1) According to vaastu the room entrance should be towards north / east... this eliminates flickering decisions
2) Window should be at extreme north west and should always be open logic is it produces positive energy flow which effects your thoughts and decisions
3) Ideal facing should be towards east / north ... this gives stable mind set and controls ones emotions which is very important to trading.
Hope the above points helps.. Please consult professional expert..