Lesson 2: Core Concepts

Lesson 2: Understanding Price Action and the Three Core Assumptions of Technical Analysis

Before you draw your first trendline or calculate a moving average, you need to understand the bedrock principles that make technical analysis work. Many traders jump straight into indicators without grasping why charts move the way they do. This lesson covers the three fundamental assumptions that underpin all technical analysis and introduces you to price action—the purest form of market information. Mastering these concepts will help you avoid costly mistakes and develop a logical framework for reading any chart on the NSE or BSE.

The Three Core Assumptions of Technical Analysis

Technical analysis rests on three foundational beliefs that have been validated across decades of market observation:

1. Price Discounts Everything: This principle states that the current market price reflects all available information—past events, current news, earnings reports, policy changes, and even future expectations. When the Reserve Bank of India announces a repo rate change or a company declares quarterly results, these factors are quickly absorbed into the stock price. For a technical analyst, this means you don't need to track every news headline or read balance sheets; the chart already shows you the collective judgment of all market participants.
2. Price Moves in Trends: Markets don't move randomly. They tend to move in identifiable directions—uptrends, downtrends, or sideways trends—for sustained periods. Once a trend is established, it's more likely to continue than to reverse. This is why you'll hear traders say "the trend is your friend." When Reliance Industries begins an uptrend after consolidation, it typically doesn't reverse immediately; it continues higher until exhaustion. This tendency toward persistence is what allows technical analysts to make probabilistic forecasts.
3. History Repeats Itself: Human psychology drives market behavior, and human nature doesn't change. The patterns of fear, greed, hope, and panic that created chart formations fifty years ago still create similar patterns today. When Nifty 50 forms a double top near resistance, it behaves similarly to countless double tops that came before it. This repetition makes chart patterns predictive tools, though never with absolute certainty.

What Is Price Action?

Price action refers to the movement of price over time—the raw data that forms the foundation of your charts. It's represented by three essential data points: the price level, the time, and the volume traded. Everything else you see on a chart—candlesticks, bars, indicators—is derived from these three pieces of information.

When you study price action, you're observing the actual battle between buyers and sellers. A rising price means buyers are more aggressive; a falling price signals seller dominance. The speed of movement and the volume accompanying it tell you about conviction. Sharp moves on high volume suggest strong commitment, while slow drifts on low volume indicate indecision.

Open, High, Low, Close: The Building Blocks

Every time period on a chart—whether it's a 5-minute candle or a daily bar—contains four critical price points:

• Open: The first traded price during that period
• High: The highest price reached during that period
• Low: The lowest price reached during that period
• Close: The last traded price during that period

These four data points (called OHLC) create candlesticks or bars. For Indian markets, the daily candle opens at 9:15 AM IST and closes at 3:30 PM IST. The relationship between these four points tells you a story about the trading session.

A Real Indian Market Example: Reading Tata Motors Price Action

Let's apply these concepts to a concrete example. Imagine Tata Motors opens at ₹650 on Monday morning. During the day, enthusiastic buyers push it to an intraday high of ₹668, but profit-booking emerges and the stock falls to a low of ₹645 before recovering to close at ₹662.

What does this price action tell us? First, the close above the open (₹662 vs ₹650) indicates buyers won the day—this forms a bullish candle. Second, the stock tested ₹645 but buyers defended that level, suggesting support exists near that price. Third, the inability to sustain ₹668 hints at resistance or selling pressure at higher levels. Finally, the strong recovery from ₹645 to ₹662 shows buyer conviction.

Notice we didn't need any indicators, moving averages, or external news. The price action itself, grounded in the three core assumptions, provided actionable information. The price had already "discounted" whatever news drove the movement, was potentially part of a larger trend, and formed a pattern (bullish engulfing, perhaps) that has historical significance.

Support and Resistance: Price Action's Natural Boundaries

As price moves, it creates reference points—levels where buying or selling pressure has previously emerged. These become support levels (where buyers step in) and resistance levels (where sellers emerge). In our Tata Motors example, ₹645 acted as support and ₹668 as resistance. These levels become self-fulfilling as traders remember them and act when price returns.

On Nifty 50, you might observe that 21,500 has been tested three times in the past month and held as support each time. Technical traders will place orders near this level, expecting it to hold again—and their collective action often makes it hold.

Key Takeaways

• The three core assumptions—price discounts everything, price moves in trends, and history repeats itself—form the logical foundation for why technical analysis works across all markets including NSE and BSE.
• Price action (OHLC data) is the most fundamental form of market information; everything else on your chart is derived from these four numbers per time period.
• You can extract meaningful trading information from pure price action without indicators, by observing the relationship between open, high, low, and close prices.
• Support and resistance levels emerge naturally from price action as the market creates reference points where buying or selling pressure has previously appeared.
• Understanding these concepts before learning indicators or patterns will make you a more logical, disciplined trader who knows why charts work, not just how to read them.