Mars in eleventh house is in the house of its friend Jupiter. Mars fares well in eleventh house especially if there is a favorable sign. According to B. V Raman native will be eloquent and assertive speaker. He would be clever and rich but also prone to lustful activities. He would buy many properties and have considerable influence in the top circles.

     Mars in eleventh house does well. The results are far better if there is a favorable horoscope sign and friendly planets associated with Mars. Native is popular in friends and social circle. Native likes to be the center of attention in inner circles. Native earns a decent income and has the capacity to work hard to get better financial gains. Native is ambitious and enterprising. In a bad sign this auspicious placement can provide bad effects. It can give jealous and back stabbing friends and also there could be difficulties in earning regular income.

     The aspect on second house could presents problems with saving money as well as fights with family members. Native loves over-spending and has less desire to do savings in life. Natives are advised to save their money in gold format as savings in cash would disappear in no time. Aspect on fifth house makes the native romantic. He/She could have many romantic relationships. If Venus or Rahu are co-tenants or placed in fifth house than there is every possibility that native opts for love marriage and sometimes even gets involved in runaway marriage against wishes of family and society. The aspect on sixth house gives bad results for health. There can be stomach problems especially acidity and indigestion. Aspect on sixth house gives victory over enemies.

     Overall eleventh house is a great placement for Mars. To strengthen its good effect natives must pray to Lord Vishnu and Goddess Laxmi. Also native must avoid foods which cause ulcers, acidity and indigestion. Native must also be careful not to get involved in relationship outside of marriage. 

References:

Raman B. V (2016) How to Judge A HOROSCOPE Volume II, Delhi,Delhi: Motilal Banarsidass Publishers