Is feeling of extreme anger a sign if not having enough bi-polar medication?

Probably. Irritability or unjustifiable anger are common symptoms of bipolar disorder and may be part of depression, mania, or mixed episode. Most individuals with bipolar disorder spend much of the time in a mixed episode if not adequately treated. A mixed episode is a combination of manic and depressive symptoms.
Yes. Irritability is a common symptom of mania & depression in 1970 wardens were asked 2 identify prisoners who were periodically violent and the prisoners were asked to voluntarily take lithium over 80 percent stopped being irritable.