How can one judge our Graha-dosha by reading only hasth-rekha? I think from kundli it can be done but how from hastha-rekha? Probably our groha changes in every ten years but does also hasth-rekha changes?
If you take your palm print every year. You can easily see after 10-15 years that it changes! There is no doubt about it.
Palmistry is part of astrology. In ancient India, Palmistry was known as "Samudrika Shastra".
World's most famous palmist Cheiro learned palmistry from an Indian Brahmin from Maharastra. He mentioned that in his biography.
Ref: Language of the hand by Cheiro https://www.amazon.in/Cheiros-Language-Hand-Cheiro-ebook/dp/B07C38PKKM/ref=tmm_kin_swatch_0?_encoding=UTF8&qid=1559207417&sr=8-3
By the way, most of the horoscope analysis is done based on the position of planets at the time of native's birth. Your horoscope is basically the snapshot of the sky when you were born. That is why they ask for three info: date of birth, time of birth and place of birth. This snapshot varies depending on time and place. So it is the analysis of fixed planetary positions during your birth that predicts your entire life! Only the transit (or gochara) analysis takes into account of changing planetary positions with time.