help yourself, columbus...
these are pivot levels (also known as trading floor pivots) useful for a particular day, based on the movement of the scrip/index during the previous trading session.
if u trade only a particular stock/index everyday, then u can calculate these levels using the universal formula for such pivotal levels by providing the previous trading session's High, Low & Close values of your particular scrip/index spot/fut
one online pivot calculator is available at:
traderknowledge . com/free-online-pivot-point-calculator.php
over here, just enter 0 (zero) for Open values.. (u will get same results even if u enter any value or correct value for Open....but all other values - LOW, HIGH, CLOSE should be perfect, as seen in your broker-provided trading terminal/software.
also, there are many websites which give these levels readily calculated, as Rameshji has been giving sincerely since so many days.
prafulstockpiks . com/reports1.htm
stratstar . com/BSE-India-NSE-SupportResistanceLevels.htm
and many others...
the logic of pivots is that once the pivotal (central) level is sustained, then R1 / R2 can be targetted/provide resistance.
similiarly, if the scrip/index sustains below the pivotal level, then S1, S2 can be attained/provide support...
similiarly, if scrip/index opens at R1 level & profit-booking is seen, then support can be found at pivot...
in short the movement of the scrip/index is in this direction:
S3 -> S2 -> S1 -> PIVOT -> R1 -> R2 -> R3
in ranged-trading days, we may even see "table-tennis" between any 2 consecutive levels, like Pivot & R1, or R1 & R2, S1 & Pivot, etc
u must have noticed such posts/levels in our nifty intraday trading thread.