Open any trading app and you will see horizontal lines labelled PP, R1, R2, S1, S2. Most people nod, pretend they understand, and never ask where those numbers come from.
They come from three numbers and a division. That is genuinely all. Let us do the arithmetic together, on SENSEX, with real strike steps — and then talk about what the lines can and cannot tell you.
Take yesterday's high (H), yesterday's low (L), and yesterday's close (C). The central pivot is just their average:
PP = (H + L + C) ÷ 3
Everything else is built outward from PP:
R means resistance, S means support. R1 is the first resistance above the pivot, R2 the next one up, and so on. No indicator, no smoothing, no settings to tune. Yesterday's numbers go in, today's lines come out, and they stay fixed all day.
Suppose SENSEX yesterday made a high of 74,980, a low of 74,420, and closed at 74,760.
PP = (74,980 + 74,420 + 74,760) ÷ 3 = 2,24,160 ÷ 3 = 74,720
The day's range was 74,980 − 74,420 = 560 points. Now fill in the ladder:
| Line | Working | Level |
|---|---|---|
| R3 | 74,980 + 2 × 300 | 75,580 |
| R2 | 74,720 + 560 | 75,280 |
| R1 | (2 × 74,720) − 74,420 | 75,020 |
| PP | average of H, L, C | 74,720 |
| S1 | (2 × 74,720) − 74,980 | 74,460 |
| S2 | 74,720 − 560 | 74,160 |
| S3 | 74,420 − 2 × 260 | 73,900 |
Think of PP as the previous match's average score. If today's team is batting comfortably above it, the tone is positive. If they keep slipping below it, the tone is negative. It is not a prediction of the result — it is a reference point everyone can see.
That last part matters more than the maths. Pivot levels are popular precisely because so many screens draw the same lines from the same public data. When a lot of participants are watching 75,020, orders tend to cluster there. The level has meaning because it is crowded, not because the formula is magic.
SENSEX options trade on BSE, expire on Thursday, move in strike steps of 100, and carry a lot size of 20. Those four facts change how a pivot ladder is read in practice.
First, the strike grid rarely lands on your pivot. PP of 74,720 sits between the 74,700 and 74,800 strikes. There is no 74,720 strike and there never will be. So the level is a chart reference; the instrument you actually buy is the nearest listed strike.
Second, the distance between levels tells you whether a level is even reachable. In our example, PP to R1 is 300 points. Ask yourself plainly whether SENSEX has been covering 300 points in the time you plan to stay in the trade. If the last few sessions have been 400-point days end to end, R2 at 75,280 is a fantasy, not a target.
Third, and most painfully: on Thursday, time decay does not care about your lines. A weekly option can drift toward zero while the index sits politely between PP and R1 doing nothing. The chart level holds. Your premium does not.
The version above is the classical or floor-trader pivot. Your platform may also offer Fibonacci pivots (same PP, levels spaced by 0.382, 0.618 and 1.000 of the range), Camarilla (much tighter levels, built for mean-reversion), and Woodie's (which weights the close more heavily). None is superior. They are different ways of slicing the same three numbers, and switching between them until one fits yesterday's chart is curve-fitting, not analysis.
They do not tell you direction. They do not tell you position size. They do not tell you when to get out. A level is a place where something might happen; everything that makes a trade survivable — the stop, the quantity, the exit rule — lives outside the formula and has to be decided by you, before you click buy.
Next time you open your chart, calculate PP by hand once. Three numbers, one division. Once you have done the arithmetic yourself, those lines stop being decoration and start being information.