Channel
Also written Price channel · Trend channel
Two parallel trendlines, one through the highs and one through the lows, boxing price action into a range — traders trade within it, or watch for a breakout from it.
In plain language
A trendline alone shows one boundary. A channel shows two, running in parallel — one along the highs, one along the lows — with price action moving between them.
An ascending channel, with rising highs and lows, signals bullishness. A descending channel signals bearishness. A horizontal channel signals a rangebound, sideways market.
How it works
The workbook: "A channel is formed by drawing two parallel trendlines, one connecting highs and the other connecting lows... While constructing a channel we start with a valid trendline i.e., either support or resistance. Similarly, a parallel line should start from the opposite swing point. The width of the channel reflects volatility."
The standard trading rule is to buy near the lower boundary and sell near the upper one, while the channel holds. A break through either boundary is a breakout or breakdown, and traders project a price target using the channel's width — adding (or subtracting) that width to the breakout point.
A worked example
The workbook's own case study: Reliance Industries formed an ascending channel through 2023, with the lower trendline connecting swing lows rising from Rs 1,100 to Rs 1,400, and a parallel line drawn through the swing highs above it. Early in 2024, price broke above the channel with a volume spike, signalling a bullish continuation.
Illustrative extension: if the channel's width at that breakout point was Rs 150, a trader projecting a target using channel-width projection would add that width to the breakout level — a breakout at Rs 1,450 giving a projected target of Rs 1,450 + Rs 150 = Rs 1,600.
Why NISM asks about it
Chapter 15.8 (Trendlines and Channels), including the Reliance Industries case study, sets out channel construction and trading rules. Expect a question on ascending versus descending versus horizontal channels, and on the standard buy-support/sell-resistance rule within a channel.
Common exam traps
- A channel needs genuinely parallel boundary lines. If the two lines are converging or diverging instead, the pattern is a triangle or a wedge, not a channel.
- A channel breakout without volume confirmation is more likely to be a false breakout — the workbook stresses volume confirmation across its breakout discussion generally.
Check yourself
1.Which statement on drawing trendlines follows the workbook?
- a)A trendline needs at least two points, three or more points increase its reliability, and it should be adjusted as new price data emerges
- b)A trendline must always be drawn through closing prices, never through wicks
- c)An upward sloping trendline is drawn by connecting lower highs
- d)Once drawn, a trendline should never be adjusted, because adjusting it is "forcing lines"
Show the answer
Answer: (a) A trendline needs at least two points, three or more points increase its reliability, and it should be adjusted as new price data emerges
Straight from the text: "A trendline construction requires at least two points, while three or more points increase the reliability of the trendline." And: "The trendline should be adjusted as new price data emerges."
Option B is too rigid: "Traders sometimes use wicks, and other times use closing prices depending on the nature of the strategy." Option C swaps the two slopes — "an upward sloping trendline connecting higher lows indicates bullish momentum; a downward sloping trendline connecting lower highs indicates bearish momentum". Option D misnames the pitfall. Forcing lines means "drawing trendlines/channels that fit bias rather than price"; the workbook lists not adjusting as a separate pitfall — "Ignoring Breakouts: not adjusting lines after invalidation".
2.A stock forms an ascending triangle with flat resistance at ₹680. Its rising lows are ₹590, then ₹625, then ₹652, and it breaks out above ₹680. Applying the workbook’s rule, what is the profit target?
- a)₹708
- b)₹735
- c)₹770
- d)₹680
Show the answer
Answer: (c) ₹770
The rule is: take the height of the triangle at its thickest point and add it to the breakout point.
- The thickest point is the left edge, where the rising lower trendline is furthest from resistance — the first low, ₹590.
- Height = 680 − 590 = ₹90
- Target = breakout ₹680 + ₹90 = ₹770
₹708 comes from measuring at the last low (680 − 652 = 28), which is the triangle at its thinnest — the exact error the phrase "at its thickest point" is there to prevent. ₹735 uses the middle low. ₹680 comes from adding the height to the swing low instead of the breakout, which merely returns you to the breakout level.
The same measured-move logic applies to a channel, where the workbook calls it channel width projection.
3.Crude oil prices rise sharply. Applying the workbook's reasoning, what is the expected effect on a domestic airline and on an oil producing company?
- a)Both benefit, since a rising commodity signals stronger global growth
- b)Both suffer, since rising input costs reduce profit margins across the economy
- c)The airline's profitability falls because of high input cost, while the oil producer's profitability improves
- d)The oil producer's profitability falls because it must pay more for exploration, while the airline can raise fares
Show the answer
Answer: (c) The airline's profitability falls because of high input cost, while the oil producer's profitability improves
This is the workbook's own example: rising crude oil prices improves the profitability of oil producing companies and at the same time, reduces the profitability of airline and logistics companies because of high input cost.
The general rule is that a rise in commodity prices increases input costs, which reduces profit margins of companies, and conversely falling commodity prices can improve profitability and boost stock valuations. But the rule applies to companies that use the commodity as raw material. A company that sells the commodity sees the opposite.
Option B is the half-remembered version of the rule, applied without asking which side of the invoice the company sits on — it is the most commonly chosen wrong answer here. Option A confuses the signal channel (a commodity move as information about global demand) with the cost channel (a commodity move as a change in input cost), and applies the signal reading to a company whose margin is directly hit. Option D simply inverts the workbook's example.
Where this is taught
Free preparation for NISM Series XVRelated terms
- Ascending triangleA chart pattern of rising swing lows against one flat resistance level — a bullish continuation pattern signalling that buyers are gradually overpowering sellers before a breakout.
- Congestion areaA price range where a stock trades repeatedly for an extended period, typically several weeks, before eventually breaking out upward or downward.
- Moving averageThe average price of a share over a rolling window, recalculated each session — it smooths away daily noise so that the underlying trend, and changes in it, become visible.
- Support and resistancePrice levels where a move tends to pause or reverse — support where demand concentrates and forms a floor, resistance where supply concentrates and forms a ceiling.
- RSIA momentum oscillator scaled 0 to 100 that measures the speed and size of recent price changes — conventionally read as overbought above 70 and oversold below 30.
- Piercing PatternA bullish two-candlestick reversal pattern near the bottom of a trading range — a red candle followed by a green candle whose body covers at least half the red candle's body.
- Point and Figure chartA chart that plots only price movement using columns of X and O marks, ignoring both time and volume entirely — used to filter noise and spot breakout, support and resistance levels.
- Role reversalThe technical-analysis principle that once a support level is broken it tends to become resistance, and once a resistance level is broken it tends to become support.
- Flag and pennantContinuation patterns in which price pauses sideways after a sharp rally — in a rectangle (flag) or a small triangle (pennant) — before the original move resumes.