This work reports our preliminary work on the development of biofeedback for gait rehabilitation. Based on observations on the difference in walking patterns of people with walking handicap, time-domain features have been proposed as the indicator of the status of walking capability. Based on continuous walking experiments of a treadmill, the standard deviation of the Tp-p period and the mutual relationship between the Tp-p period and corresponding Tp-v and Tv-p periods are discussed as the candidate indicator of biofeedback mechanism. At present, we are collaborating with the researchers from Faculty of Allied Health Sciences, Thammasat University in order to perform more experiments with human subjects with past stroke incidents.