Introductory Context
"A candlestick is a visual compression of four pieces of information -- Open, High, Low, Close -- into a shape that instantly communicates the balance of power between buyers and sellers during that session. The body tells you who won. The shadows tell you how hard the other side fought. Together, they reveal not just where price ended up, but what happened along the way. For options traders, this story determines whether a setup is high quality or marginal. "
The Four Numbers Behind Every Candle
Before you can read a candlestick, you need to understand what each of the four numbers represents. The Open is the price at which the first transaction of the session occurred -- in India, that is the 9:15 AM opening. The High is the highest price reached at any point during the session. The Low is the lowest price touched at any point. The Close is the price at which the last transaction occurred at 3:30 PM.
These four numbers are always available for any instrument on any timeframe. A daily candlestick on Nifty uses the 9:15 AM open, the day's high and low, and the 3:30 PM close. A weekly candlestick uses the Monday open, the week's high and low, and the Friday close. A 15-minute candle uses the open and close of that 15-minute window, with the high and low of all trades within it.
OHLC Defined
O = Open: Price of the first trade of the session. H = High: Highest price traded during the session. L = Low: Lowest price traded during the session. C = Close: Price of the last trade of the session. The relationship between these four values determines the shape, size, and colour of every candlestick you will ever see.
The Body -- Who Won the Session
The body of the candlestick is the filled rectangle drawn between the open and the close. If the session closed higher than it opened, the body is drawn in green (or hollow in older charts) -- buyers won, and the close is at the top of the body. If the session closed lower than it opened, the body is red (or filled black) -- sellers won, and the close is at the bottom of the body.
The size of the body communicates the conviction of the winning side. A large green body -- where the close is significantly above the open -- means buyers drove prices higher continuously throughout the session with little opposition. A small body, regardless of colour, means the session was contested. Both sides traded, and by the close, neither had established a decisive advantage. Small bodies are the candlestick's way of saying: this session produced no clear winner.
Body Size Is a Conviction Meter
Large body = strong conviction from the winning side. Small body = weak conviction, contested session, potential indecision. When you see a large-bodied candle at a key support or resistance level, the size of that body directly reflects how forcefully the market reacted to that level. A tiny body at the same level is a much weaker signal.
The Shadows -- The Story of the Battles Within
The thin lines extending above and below the body are called shadows (also known as wicks or tails). The upper shadow shows how high buyers pushed prices above the closing level before sellers pushed them back. The lower shadow shows how low sellers pushed prices below the closing level before buyers pushed them back.
This is where the real story lives. A candle with a very long lower shadow is telling you something specific: sellers tried hard during the session to push prices lower, but buyers rejected every move lower and drove the price back up before the close. The longer that lower shadow, the more aggressively sellers tried and the more decisively buyers rejected them.
The shadow is the scar from the battle. The body shows who won. The shadow shows how bloody the fight was. A long lower shadow at a key support level means sellers attacked and lost. That is powerful information.
Never Act on a Candle Before It Has Closed
A candle that looks like a Hammer at 2:30 PM may look completely different by 3:30 PM. An intraday lower shadow can disappear if sellers return in the final hour. An apparent bullish candle can turn red if the last thirty minutes see heavy selling. Always wait for the session close before treating any candlestick pattern as confirmed. Acting on an incomplete candle is one of the most common and most avoidable technical analysis errors in options trading.
Green vs Red -- The Colour Tells You Direction, Not Quality
A green candle does not automatically mean a strong bullish signal. A green candle with a tiny body and large upper shadow is actually a weak signal -- buyers technically won (close above open) but sellers fought them hard and capped the advance. Similarly, a red candle with a long lower shadow and close near the high of the session may signal that sellers tried and failed, and buyers are actually stronger than the colour suggests.
This is why professional technical analysts do not simply count green candles and red candles. They read the relationship between the body size, the shadow size, and the position of the body within the total session range. A close near the session high (regardless of colour) is bullish. A close near the session low is bearish. Where the close lands within the full range is more informative than simply which colour the candle is.
The Single Most Important Candlestick Principle
A close near the session HIGH -- whether the candle is technically green or red -- reflects buyer control at the close. A close near the session LOW reflects seller control. The position of the close within the day's range often matters more than whether the candle is green or red. When a candle with a large lower shadow closes near its session high, buyers dominated the close regardless of the candle's colour.
Applying This to Nifty Options: The Daily Chart
On the Nifty daily chart, every session from 9:15 AM to 3:30 PM produces one candlestick. The most important sessions for options traders are those that occur at significant price levels -- the 50-day EMA, the 200-day EMA, a prior support or resistance zone, a round number like 23,000 or 24,000. A candlestick at these levels carries far more analytical weight than the same pattern in the middle of empty chart space.
When you open TradingView or Zerodha Kite and look at the Nifty daily chart, you are reading a daily account of who won each session for the past year. Patterns in this history reveal where buyers consistently defend prices (support) and where sellers consistently resist advances (resistance). Every candlestick in Module 07's subsequent topics is read against this backdrop of known price levels and established trend structure.
Set Your Nifty Chart Correctly Before Analysing
On TradingView: use the Candlestick chart type (not Heikin-Ashi, which smooths data and distorts OHLC values). Set the default timeframe to 1D (daily) for your primary analysis. Add a volume indicator below the price chart. The standard green/red colour scheme is already the default. On Zerodha Kite: open the Nifty chart, select Candle chart type, and verify the timeframe. These settings are your baseline for all analysis in Module 07.
The Weekly Candlestick for Monthly Options Positioning
When you switch to the weekly chart on Nifty, each candlestick now represents five full trading sessions. The open is Monday's open, the close is Friday's close, the high and low capture the entire week's range. This longer timeframe filters out daily noise and reveals the underlying trend with much greater clarity.
For traders positioning monthly options (Bank Nifty last-Tuesday monthly expiry, Nifty monthly), the weekly chart is the primary structural reference. A weekly candlestick pattern -- a Hammer on the weekly chart at a weekly support level -- is telling you about the balance of power between buyers and sellers over an entire week, not just one session. That is a more significant statement and typically precedes larger moves.