Well here is what i normally do ..indices can be super volatile and that makes it makes it to trade so what i then do is mark out clearly my support and resistance levels and trend lines after i have done so when price comes to retest a support or resistance i wait to see a rejection at these key levels in the form of a wick or spike then that will be my entry after the rejection on the H4 or H1 then ill look to enter in the 15m with my stop below the spile or wick