The candlestick chart

The Bar chart gives us all four pieces of data (Open, High, Low, Close), but it is a strain to read. Your brain has to consciously check which tiny horizontal tick is on the left and which is on the right to figure out if the day was positive or negative.

When you are staring at a chart with 300 bars on it, trying to spot a trend, you do not have the time to squint at ticks. How do we make the outcome of the day instantly visible from across the room?

Centuries ago, Japanese rice merchants solved this exact problem. They created a charting method that uses thick, coloured blocks to represent the net price movement of the day.

The candlestick chart uses the exact same four data points as the Bar chart (OHLC). It doesn't add any new math. It simply packages the data into a shape that the human brain can process instantly: colour and mass.

Instead of a thin line with ticks, a candlestick connects the Open and the Close to form a thick rectangle called the "body".

• If the Close is higher than the Open, the body is coloured green (or left white). Buyers won.
• If the Close is lower than the Open, the body is coloured red (or filled black). Sellers won.
• The thin lines poking out of the top and bottom of the body are called "wicks" (or shadows). They reach up to the High and down to the Low.

Interact with the playbook below to watch how a candlestick physically forms during the trading day, and pay attention to what happens when price retreats.

When the tables turn and sellers take control, the candlestick simply reverses color. Watch how a bearish, red candlestick forms when sellers overwhelm buyers:

Every price in this module is an illustrative example, not a real quote. [illustrative]

The shape of the body and the length of the wicks tell a story about supply and demand.

1. The solid green block (no wicks): Absolute buyer dominance. A tech stock announcing blowout earnings. It opened at the absolute low, climbed all day, and closed at the absolute high.
2. The long upper wick: A rejection. A stock broke out to a new high, luring in retail buyers, but institutional sellers used that liquidity to dump their shares, crushing the price back down. The wick is the scar they left behind.
3. The Doji (a cross): Indecision. The Open and Close are exactly the same. Buyers pushed it up, sellers pushed it down, but by 3:30 PM, nobody had gained an inch.

These three — the solid block, the long wick, the doji — are the whole vocabulary. Every named candle is just a different balance of body to wick.

Just like the Bar chart, a candlestick cannot tell you what order the High and Low occurred in. A candle with a long upper wick and a long lower wick could have hit the high first and then the low, or the low first and then the high.

To know the exact sequence of events, you have to drop down to a lower timeframe (e.g., looking at a 15-minute chart instead of a Daily chart).

The biggest trap with candlesticks is treating them like magic runes. Fin-influencers will sell courses telling you that a "Hammer" candle means you must buy instantly.

A candlestick is just a record of a past battle. A Hammer candle means buyers stepped in at a certain price level today. It does absolutely nothing to guarantee they will still be there tomorrow. Context (where the candle forms on the chart) matters far more than the shape of the candle itself.

Before you act on any single candle, ask: what would change your mind? If the very next session closes back below the Hammer's low on strong volume, the "reversal" read is dead — and if you had no such exit condition in advance, you were never reading the candle, only hoping.

The candlestick is the undisputed king of charting. You will use it for 99% of your analysis.

But modern software has introduced a confusing variation of it. Sometimes you will see a candle that is coloured Red, but its body is completely Hollow. How can a down-day be empty?

We need to quickly clarify the hollow candle before moving on.