Kala Sarpa Yoga:  

|| Agre Rahu Adhou Ketu, Sarva Madhya Graha ||

Rahu takes the lead in forming this Kala Sarpa Yoga. Place your finger on the Ketu and then move the finger in the zodiacal direction of the rashi’s until you reach Rahu. If all the planets are in this half or signs, then Kala sarpa Yoga is generated. 

Results: It brings immence suffering till the native crosses the natural age of the nodes. Suffering can make a person a devil or a saint. In the case of kala Sarpa yoga, a person becomes the evil one and then the criminal tendencies and destructive nature comes to the fore.

Mantra Remedy: Worship of Durga in Her form of Chandi is recommended. Performing Chandi Homam and recitation of Chandi mantra is recommended to completely dissolve this kala Sarpa yoga.

You shall book Chandi homam, Durga homam in the below link : 
 http://www.vedicfolks.com/health/karma-remedies/homams/chandi-homam-bid-goodbye-to-the-evil.html
http://www.vedicfolks.com/career/karma-remedies/homams/durga-homam-get-a-trouble-free-life.html 

Kala Amrita Yoga :

Kala Amrita yoga is the exact opposite of Kala Sarpa yoga and is based on

|| Agre Ketu Adhou Rahu Sarve madhya Graha||

Here in Kala Amrita Yoga, Ketu is in the lead instead of Rahu. Place your finger on the Rahu and then move the finger in the zodiacal direction of the rashi until you reach Ketu. If all the planets are in this half or signs, then Kala Amrita Yoga is formed. 
 

Results: It brings immense suffering till the native crosses the natural age of the nodes. In the case of kala Amrita yoga, a person becomes the kind or spiritual and then the spiritual directions and non-attachment nature is revealed.

Mantra Remedy : Worship of Ganesha is recommended. Performing Ganesha homams and chanting Ganesha mantra will dissolve this dosha completely

There were 54+ Ganesha homams available from Vedicfolks. You shall choose one or multiple homams from the link below :
http://www.vedicfolks.com/ganapathi-homam.html