One line, one question
In lesson 1 you met the four stages. Every one of them is read against the same line on the chart: the 30-week moving average.
It is easier than it sounds. Take the closing prices of the last 30 weeks, add them up, divide by 30. Next week, drop the oldest week, add the newest, and do it again. Join those numbers up and you have a smooth line that moves with the stock, but slowly.
That slowness is the whole point. A single bad week — a weak quarterly result, a market sell-off, a rumour — barely nudges an average of 30 weeks. Only a change that lasts, a real shift in who is buying and who is selling, can bend it. So the line answers one question: which way is this stock really going?
Why 30 weeks? Try it yourself
Any length of average smooths the price. The question is how much. Too short and the line jumps around with every wiggle. Too long and it turns so late that the move is half over.
Below is ITC from mid-2019 to the end of 2024: a long fall, the Covid low, a slow base, and then a big climb. Drag the slider and watch two numbers move in opposite directions.
At 10 weeks, the line hugs the price. It turns quickly after the low, but the price crosses it again and again — each crossing a moment when the trend seemed to change and didn't.
At 50 weeks, the line is calm. The price hardly ever crosses it. But after the 2020 low it took most of a year to turn up. By then, much of the first leg was already done.
30 weeks sits in between. It isn't magic, and there is no perfect number — every length trades speed against calm. Weinstein chose 30 weeks because it ignores most of the noise and still turns while a new trend is young. Decades later it is still the standard line for this method, and so many traders watch it that the line itself tends to matter.
Read it in two glances
When you open a chart, look at two things, in this order.
First glance: the slope. Is the line rising, flat, or falling? This is the trend, and it matters most.
Second glance: the side. Is the price above the line or below it? This tells you whether the trend is being respected right now.
| The line is… | The price is… | What it usually means |
|---|---|---|
| Rising | Above it | A healthy uptrend. Stage 2 territory. |
| Rising | Just dipped below | A test. Often a pullback inside an uptrend — watch whether it gets back above within a few weeks. |
| Flat | Crossing back and forth | No trend. A base (Stage 1) or a top (Stage 3), depending on what came before. |
| Falling | Just popped above | A bounce inside a downtrend, until the line itself turns. |
| Falling | Below it | A downtrend. Stage 4 — stay away. |
Most people only take the second glance. They see the price cross above a line and call it a buy. The first glance is what saves you.
The slope matters more than the cross
Here are two of India's best-known companies over exactly the same 21 months, January 2022 to September 2023.
Same market, same years, two very different lines. On ITC, the line was rising, so the price staying above it meant something: buyers were in control and kept stepping in on every dip. On RELIANCE, the line was flat, so crossing it meant nothing at all. There was no trend to be on the right side of.
That is why stage analysis reads the slope first. A cross above a flat line is noise. A cross above a line that is turning up is the beginning of a trend. And a cross below a line that is already falling is the market telling you, again, to stay away.
Three more mistakes people make
Using the 30-day instead of the 30-week. On a daily chart, a "30" average is only six weeks long — a completely different line. Set the chart to weekly, or use 150 on a daily chart.
Panicking at one close below a rising line. In a strong uptrend the price will sometimes dip under the line for a week and snap back. One week is a warning, not a verdict. What changes the picture is the price staying below while the line flattens.
Waiting for a falling line to "look cheap". A stock far below a falling line is not a bargain; it is a stock in Stage 4. The line has to stop falling — and ideally turn up — before the story can change.
See it on any stock
You don't need to draw anything. Every stock page on Stage2Stocks opens on a weekly chart with the 30-week line already on it, and the price coloured by its stage.
Try it on Stage2StocksOpen a stock and take the two glancesLook at the line first — rising, flat or falling? Then the price — above or below? That is the reading this whole method is built on.
What one line can't tell you
The 30-week line tells you about one stock. It can't tell you whether the whole market is helping or fighting you — and that matters, because when most stocks are falling, even good charts break down.
Right now, 36% of NSE stocks are above their 200-day average, a close cousin of the 30-week line. That single number already says a lot about the wind at your back. The next lessons build on it: first the market, then the sector, then the stock.
- Weekly chart, 30-week simple average (or 150-day on a daily chart).
- First glance: is the line rising, flat or falling?
- Second glance: is the price above it or below it?
- Only a rising line makes 'above' mean something.
- A flat line means no trend — crossings there are noise.
Questions people ask
What is the 30-week moving average?
The average of a stock's last 30 weekly closing prices, recalculated every week. Plotted on a weekly chart, it becomes a smooth line that shows the stock's long-term trend. It is the line Stan Weinstein built stage analysis around.
Is the 30-week moving average the same as the 150-day?
Almost. A week has five trading days, so 30 weeks is about 150 days. The two lines look nearly identical. Use the 30-week on a weekly chart or the 150-day on a daily chart — just don't mix it up with the 30-day, which is a much shorter line.
Should I use a simple or an exponential moving average?
Weinstein used a simple average, and that is what our charts show. An exponential average reacts a little faster because it weights recent weeks more. Either works if you stick with one; the habits in this lesson — slope first, then side — apply to both.
Why 30 weeks and not 200 days?
They are close cousins. The 200-day is about 40 weeks, so it turns a little later. Weinstein chose 30 weeks as a balance: long enough to ignore short-term noise, short enough to turn while a new trend is still young.
Is the 30-week moving average support?
In a healthy uptrend, pullbacks often stop near the rising line, so it can act like a floor. But it is not a wall. Treat a close below a rising line as a warning to watch closely, and a falling line as a sign the trend itself has changed.
How do I add the 30-week moving average to my chart?
In most charting apps: switch the chart to weekly, add a simple moving average, and set its length to 30. On a daily chart, use 150. Every stock page on Stage2Stocks already draws the 30-week line on its weekly chart.