Point in Time Index Constituents and Survivorship bias

Most backtested results look good because of survivorship bias. If one has to create a system of swing trading for nifty 500 that person has to check what all stocks had rejig for the last 5-10 years and then perform backtesting or else you will running strategies against current winners who are in nifty 500 and leave the ones who went out. So anyone here who build a swing trading system has point in time nifty 500 index constituents pls let me know.