When Spot and Future are far away then we can not get any Common Points between them. Hence we resort to different method and that is AVERAGING.
E.g. today's Day's 1st 5 minute candle ( Spot High + Future High ) ÷ 2 was ( 23882.95 + 24000) ÷ 2 = 23941.47
Draw a Horizontal Line at this level of 23941 . 47 on Nifty Future because once this level is broken below then downward rally may emerge.
Similarly calculate on screen ( Spot Day Low+ Future Day Low )
i.e. ( 23786.80 + 23940 ) ÷ 2 = *23863.40*
Draw Horizontal line at this level of 23863.40 on Nifty Spot and Observe.