A chair in a dream can point to status -- who holds a position of authority, or who's missing from one. An empty chair often reflects someone absent from your life whose presence you still feel, while sitting and waiting in one can mirror a decision you're putting off making.
There are twelve signs, one of which is constantly ascending: the ascendant signifies the body, and the lord thereof the mind. Let not that sign ascend for your purpose, whose lord is impedited. - William Lilly (1602.-1681.)