Charting Introduction

A chart is a visual representation of how a financial instrument's price has moved over time. Traders and investors use charts to spot patterns, identify trends, and make more informed decisions about when to buy or sell. If you've ever looked at a stock's price graph, you've already seen a chart.

What Is a Chart?

At its core, a chart plots price on the vertical axis and time on the horizontal axis. Each data point can represent a minute, an hour, a day, a week, or even a month of trading activity. The most common chart types you'll encounter are:

• Line charts — connect each period's closing price with a single line. Simple and clean, but they hide a lot of detail.
• Bar charts — show the open, high, low, and close for each period as a vertical bar with small horizontal ticks.
• Candlestick charts — similar information to bar charts, but with a filled or hollow "body" that makes bullish vs. bearish periods instantly visible. This is the type Engulfy uses.

Understanding OHLCV Data

Every bar or candlestick on a chart is built from five data points, collectively called OHLCV:

• Open (O) — the price at the very start of the time period.
• High (H) — the highest price reached during the period.
• Low (L) — the lowest price reached during the period.
• Close (C) — the price at the very end of the period. This is usually considered the most important value.
• Volume (V) — the total number of shares (or contracts, or coins) traded during the period. Higher volume often indicates stronger conviction behind a price move.

Together, these five values tell you not just where the price ended up, but how it got there — whether buyers or sellers were in control, how volatile the period was, and how much participation backed the move.

Timeframes

The same instrument can look completely different depending on the timeframe you choose. A stock that looks like it's crashing on a 5-minute chart may be in a perfectly healthy uptrend on a weekly chart. Engulfy tracks four timeframes:

• Daily — one candle per trading day. The most common timeframe for swing traders.
• Weekly — one candle per week. Smooths out day-to-day noise.
• Monthly — one candle per month. Good for identifying long-term trends.
• Quarterly — one candle per quarter (3 months). The big picture.

Signals detected on higher timeframes (weekly, monthly) tend to be more significant because they represent price action across a larger sample of trading activity.

Technical Analysis vs. Fundamental Analysis

There are two major schools of thought for evaluating financial instruments:

Most serious investors use a combination of both. Fundamental analysis helps you decide what to buy, while technical analysis helps you decide when to buy it. Engulfy focuses on the technical side — it watches price charts 24/7 and alerts you when meaningful patterns or signals appear.

Does Technical Analysis Work?

This is a genuinely debated topic. The Efficient Market Hypothesis (EMH), proposed by Eugene Fama in 1970, argues that prices already reflect all available information, making it impossible to consistently profit from chart patterns.

On the other hand, behavioral finance researchers like Daniel Kahneman and Robert Shiller have shown that markets are driven by human psychology — fear, greed, herd behavior, and anchoring biases — which can create recurring, exploitable patterns.

The practical truth is somewhere in between. Technical analysis is not a crystal ball, and no pattern works 100% of the time. But when combined with proper risk management and used as one tool among many, it can help traders make more structured, less emotional decisions.