Intraday support and resistance: key levels, PDH/PDL, ORB and CPR
Why intraday levels matter
Intraday support and resistance are prices where buying or selling has repeatedly appeared, or where many traders have orders waiting. Price does not react at random places. It reacts where orders cluster: obvious highs and lows, round numbers and levels everyone can see.
Knowing those places is half of intraday trading. The other half is reading what happens when price gets there: does it reject, break, or sweep and return?
R1 = 2P − L · S1 = 2P − H
BC = (H + L) / 2 · TC = 2P − BC (CPR = range between BC and TC)
Liquidity: why price is drawn to obvious levels
Liquidity means resting orders. Above an obvious high sit buy-stops from short sellers and breakout buy orders; below an obvious low sit sell-stops and breakout sell orders.
Large participants need that liquidity to fill big orders without moving price too much. That is why price is so often drawn to obvious highs and lows, takes the orders resting there, and then decides whether to continue or reverse. See Smart Money Concepts and liquidity sweeps for more.
The levels worth marking every day
Previous day high and low (PDH / PDL)
The previous day high low are the most watched intraday levels. Stops sit beyond them. A wick through and close back inside is a sweep; acceptance beyond with a held retest suggests continuation. Previous day close and the weekly high and low are useful too.
Opening range
The high and low of the first 15 minutes (9:15 to 9:30 IST), or the first 30 minutes for a wider view. The opening range shows the early auction; its break often sets the day's tone.
Equal highs and equal lows
Two or more touches at nearly the same price build an obvious pool of stops. Price is often drawn to these equal highs and equal lows.
Round numbers and big strikes
NIFTY at every 100 and BANKNIFTY at every 500 often coincide with heavy option open interest. See open interest and the option chain.
Value levels
Yesterday's point of control, value area high and low, and VWAP. See point of control and value area.
Pivot points and CPR
Floor pivots are computed from the previous day's high, low and close. Because they are mechanical and widely used, many traders watch them.
Central Pivot Range (CPR)
The CPR indicator adds two lines around the pivot: the bottom central (BC = (H + L) / 2) and top central (TC = 2P − BC). If TC comes out below BC, swap them so the range is always shown from low to high.
- Narrow CPR: often precedes a trending day.
- Wide CPR: often precedes a range day.
- Price opening above CPR: a bullish lean; below, bearish.
The full method with R2, S2 and camarilla variants is in pivot points and CPR.
How to draw support and resistance correctly
- Start on a higher timeframe (daily, then 1-hour) and mark the clear swing highs and lows.
- Add the day's mechanical levels: PDH, PDL, previous close, CPR, round numbers.
- On the 5-minute or 15-minute chart, mark the opening range once it completes.
- Draw levels as zones a few points wide, not single lines. A NIFTY level is usually 5 to 15 points wide; BANKNIFTY 20 to 50.
- Keep only levels price is reacting to today. Remove the rest.
Opening range breakout (ORB)
The opening range breakout is one of the most studied intraday approaches. After the opening range forms, traders watch for a break above its high or below its low.
What separates stronger breaks from weaker ones
- The break comes with rising volume and aggressive order flow in the break direction.
- Price holds beyond the range on a retest.
- The break agrees with the higher-timeframe trend and the open relative to CPR.
- There is room to the next level; breaking the opening range straight into PDH leaves little space.
Weak breaks often snap back inside the range, turning into a fakeout. See breakout vs fakeout. An ORB strategy on NIFTY is most often studied on 5-minute and 15-minute charts.
Sweep or break? Reading the reaction
When price trades through a level, watch the close.
- Sweep: a wick through and a close back inside. The stops were taken and the move often turns.
- Break: a strong close beyond, then a retest that holds.
The footprint helps separate them. On a sweep you tend to see absorption and trapped volume at the extreme; on a real break, aggressive imbalanced volume and follow-through. See liquidity traps and absorption vs exhaustion.
Worked example: NIFTY morning map (illustration)
The numbers are an illustration.
Yesterday NIFTY futures made a high of 24,360, a low of 24,180 and closed at 24,300. P = 24,280, BC = 24,270, TC = 24,290: a narrow 20-point CPR. Today opens at 24,320, above CPR. The opening range by 9:30 is 24,305 to 24,345.
At 9:50 price breaks above 24,345 and runs into PDH at 24,360, where it stalls. At 10:05 it wicks to 24,372 and closes at 24,350: a sweep of PDH. A trader studying this would note price has run into a level with stops taken and no acceptance, and would watch whether the opening range high at 24,345 holds or fails. If price later closed above 24,375 and held, the reading would shift to a break.
Trading F&O carries a high risk of loss; levels give a map, not a forecast.
Common mistakes with key levels
- Drawing too many lines.
- Treating levels as exact prices.
- Acting on a touch without waiting for the reaction.
- Ignoring which levels have already been used today.
- Forgetting the higher timeframe.
- No plan for where you are wrong; see position sizing.
Level strength: what makes some levels hold better
Not all levels are equal. Traders weigh a level using a few simple questions.
Timeframe
Weekly and daily highs and lows carry more weight than a 5-minute swing. A level visible on the daily chart is watched by more participants, so more orders sit near it.
Confluence
A level where several things line up is stronger: for example the previous day low, a round number and the value area low all within 15 NIFTY points. One zone with three reasons beats three separate lines.
Freshness
A level touched for the first time often reacts more than one tested five times. Each test absorbs some of the orders waiting there. Repeated tests of the same high with smaller pullbacks often end in a break.
How price arrives
A slow, overlapping drift into a level often stalls there. A fast, impulsive move into a level with expanding volume more often breaks through or sweeps it. The approach tells you as much as the level.
Role reversal
Broken resistance often becomes support on the retest, and broken support becomes resistance. This flip is the basis of the retest that confirms a break of structure.
Expiry context
On weekly expiry days, strikes with very large open interest can act like magnets or walls as option writers defend positions. See max pain and OI buildup for how traders read that.
Seeing it on the TradingMarble chart
The TradingMarble chart draws key intraday levels such as previous day high and low, opening range, pivots and liquidity zones on NIFTY, BANKNIFTY and F&O charts. With the footprint underneath, you can watch how buyers and sellers react at each level. See the features page.
Intraday levels checklist
- Mark PDH, PDL, previous close and the weekly range.
- Calculate CPR and note if it is narrow or wide.
- Mark round numbers and big OI strikes.
- Mark the opening range after 9:30.
- Keep five to seven zones; delete the rest.
- At each level, read the reaction: sweep, break or rejection.
Good intraday support and resistance comes from a short list of levels the market respects, read together with what price and order flow do when they arrive.
Frequently asked questions
How do you find intraday support and resistance?
Start with previous day high, low and close, the weekly range, CPR and round numbers. Add the opening range after 9:30 IST and recent clear swing highs and lows. Draw them as zones, keep only five to seven, and watch how price reacts at each before drawing conclusions.
Why is the previous day high and low important?
Many traders place stops and breakout orders just beyond the previous day's high and low, so liquidity collects there. Price is often drawn to these levels. A wick through and close back inside suggests a sweep; a close beyond with a held retest suggests acceptance and continuation.
What is the opening range breakout?
The opening range is the high and low of the first 15 or 30 minutes of the session. An opening range breakout is when price moves beyond that range. Traders judge it by volume, order flow, retest behaviour, room to the next level and whether it agrees with the larger trend.
What is CPR in trading?
CPR, the Central Pivot Range, is three lines from the previous day's high, low and close: the pivot, the bottom central and the top central. A narrow CPR often comes before a trending day and a wide CPR before a range day. Opening above or below CPR shows an early bias.
What is liquidity in trading?
Liquidity means resting orders, mostly stop-losses and pending breakout orders, that cluster above obvious highs and below obvious lows. Large participants need this liquidity to fill orders, so price is often drawn to these levels before deciding direction.
How many support and resistance levels should I draw?
Five to seven zones are usually enough for one intraday session. Too many lines make every price look important. Keep the levels the market is actually reacting to today and remove those that have been used or ignored.