A chart type is the visual format used to plot price (and sometimes time and volume) before any pattern-reading, indicator, or trade decision happens. All the common formats render the same underlying data — most reduce to the OHLC tuple (open, high, low, close) for a period — but they emphasize different things: a line shows trend at a glance, a candlestick exposes intrabar sentiment, and the "alternative" formats (Point & Figure, Renko, Heikin-Ashi) deliberately strip out time and/or small moves to make trend and reversal more legible. The core tension to hold onto: the chart type is a display and preference choice, not a source of edge. It changes how clearly you perceive structure; it does not change what the market did. A clean-looking chart can be a trap when the cleaning process hides information your execution actually depends on.

The formats at a glance

This section is the menu; the child docs are the depth. Reach for the format that matches the question you're asking.

• Candlestick Charts — the modern default. Each candle plots all four OHLC values for a period, with a "body" (open-to-close) and "wicks" (the period's extremes). The body's color encodes whether the period closed up or down, so a candle reads as a small unit of sentiment (who won the period and by how much), and short multi-candle formations (engulfings, dojis, hammers) become recognizable. Reach for it as your baseline for almost any discretionary chart-reading. → see Candlestick Charts.

• Bar & Line Charts — the classic alternatives. A bar (OHLC) chart carries the exact same four values as a candle but draws them as a vertical bar with left/right tick marks (open left, close right) — same information, lower visual "weight," preferred by some traders precisely because it's less emotionally loud than a colored body. A line chart plots only the closing price as a connected line, discarding the high, low, and open. That makes it the cleanest possible view of trend and the right tool for long-horizon context, multi-asset comparison, or any reading where intrabar noise is a distraction — at the cost of throwing away most of the data. → see Bar & Line Charts.

• Point & Figure (P&F) — a price-driven, time-independent format. It plots columns of X's (rising) and O's (falling) on a grid; a new mark prints only when price moves a full box size, and a new column starts only after a reversal amount (commonly three boxes) of counter-movement. Time is not an axis at all — quiet periods simply add nothing to the chart (StockCharts ChartSchool). The result strips out chop and makes horizontal support/resistance and breakouts unusually clean. Reach for it when you want congestion and breakout levels isolated from time-based noise. → see Point & Figure.

• Renko & Heikin-Ashi — the noise-smoothing pair, and the one place a beginner can get hurt by the display. A Renko chart, like P&F, is price-driven and time-independent: it adds a brick only when price travels a fixed brick size in one direction, so a trend shows as an unbroken run of same-colored bricks and a reversal as a clean color change (StockCharts; OANDA). Heikin-Ashi keeps the time axis but recomputes each candle from averaged values — its close is the bar's (O+H+L+C)/4 and its open blends the prior bar — which smooths the candles into long same-colored runs that make trends visually obvious (StockCharts ChartSchool). Reach for either when your goal is trend clarity and you've internalized the caveat below. → see Renko & Heikin-Ashi.

The honest meta-take (read before choosing)

Two things are easy to get wrong here, and both matter for real execution:

1. The chart type is not an edge. Switching formats does not improve your win rate; it changes what you see and therefore what setups you can recognize and how disciplined you stay. Pick by use-case and clarity, not in search of a magic view. Any "this chart type beats the market" claim is a claim about the user's discipline, not the format.

2. The noise-smoothing formats actively hide true price — a genuine execution caveat. This is the single most important warning on this page. Because Heikin-Ashi candles are built from averaged and prior-bar values, the prices you see on the chart are not the prices the market traded — the displayed open/close can differ from actual, true highs and lows where real support/resistance form are blurred, and the smoothing introduces lag (StockCharts ChartSchool; Investing.com support; TradingView). Renko likewise represents price in fixed bricks rather than exact ticks. So: smoothed formats are fine for reading trend, but you must place orders, stops, and targets off real price (a standard candlestick/bar or the quote), never off the smoothed chart's numbers. Treating a Heikin-Ashi or Renko level as the executable price is the classic, costly beginner mistake.

A practical default: candlesticks (or bars) for execution-grade reading where exact levels matter; line charts for long-horizon trend and comparison; P&F/Renko/Heikin-Ashi as secondary lenses to confirm trend clarity — never as the surface you trade off of.

Where this sits

This node is the overview for the Chart Types branch of Technical Analysis. It defines the category and routes; the mechanics, calculations, and trade-offs of each format live in the four child docs — Candlestick Charts, Bar & Line Charts, Point & Figure, and Renko & Heikin-Ashi. Indicators, patterns, and the trade-setup logic that consume these charts live in their own TA branches and downstream in the Augustus agent; choosing a chart type is upstream of all of it.

Sources

• StockCharts ChartSchool — Heikin-Ashi Candlesticks; Renko Charts; Introduction to Point & Figure Charts (chartschool.stockcharts.com)
• Investing.com Support — "Why do the Heikin Ashi Chart and Candlestick Chart Show Different Prices?"
• TradingView — Understanding Heikin Ashi charts; Understanding Renko charts; What are Point and Figure charts
• OANDA — "Tips for using Renko charts in your trading"