A continuous socket/suspension monitoring system according to principles of the present invention tracks relative displacement between amputee residuum and their socket using magnetic sensors. The system includes at least one magnetic sensor in a liner worn on the amputees' residuum which correspond to sensors provide in or on the prosthesis socket. The system allows for monitoring of pistoning continuously during locomotion and does not require socket modification, is safe to amputee patients, is easy to use, and is low cost.