Case: choose at most three tools

Trading apps make it easy to switch on every line and gauge at once. It feels thorough: if several tools agree, the decision must be safer. It usually works the other way.

Most chart tools are built from the same few numbers: the closes, the highs and lows, the volume. Three averages of the same closes are one idea drawn three times. When they agree, nothing new has been confirmed; when they disagree, you get noise and hesitation.

Nora's Bluefin Energy chart on Pebble shows the result: three averages, the momentum gauge, volume and a range line. They "never agree", so she either freezes or clicks at random. Doing nothing costs nothing; random clicks pay the spread and the commission each time.

The useful question is not "how many tools?" but "what job does each one do?" A tool earns its place only if it answers a question no other tool on the screen answers.

Each tool from this module answers one honest question about the past:

• A moving average (from Moving averages): has the price been rising, flat or falling over the last weeks? It lags and whipsaws in a range.
• The momentum gauge (from A momentum gauge and the overbought myth): were the last 10 days mostly up or mostly down? It doesn't time turns.
• The average daily range (from Volume and volatility): how wide is ordinary noise, so where can a stop sit outside it? It has no direction.
• Volume: how busy was trading, and might orders fill badly? It doesn't show who was right.

Notice the question missing from the list: "what happens next?" It isn't on any tool's menu, however many tools you switch on.

A good habit, and the one Marc, the experienced trader in this course, uses, is to count jobs, not lines. If two tools answer the same question, one of them is clutter. If a tool answers no question your plan needs, it is clutter too.

A 5-day, a 10-day and a 20-day average look like three opinions. They aren't: all three are built from the same Bluefin Energy closes, and the longer ones simply contain the shorter ones' days.

The numbers from Nora's 60 days on Pebble, 2026-03-30 to 2026-06-19:

• On 46 of 60 days the close sat on the same side of all three averages, above all of them or below all of them: 46 ÷ 60 × 100 ≈ 76.7% of the days.
• The close crossed the 5-day average 14 times, the 10-day 15 times and the 20-day 16 times. In the sideways weeks from May, all three whipsawed together.

So on about three days in four the three lines told the same story, and when the market went sideways, the faster line gave no useful early warning: it flipped as often as the others. Keep one average and use it the same way every time, only for the backdrop. Which length matters less than consistency.

Two quick tests show whether a tool adds anything to a chart.

1. Same input? If two tools are calculated from the same numbers in the same way, with only a different window, they will mostly move together. Averages of 5, 10 and 20 closes are the clearest case.
2. Same question? If two tools answer the same question, for example "has the price been rising?", keep the one you understand best and drop the other.

On Nora's Bluefin Energy chart the three averages fail both tests: same closes, same question, agreement on 46 of 60 days. The average daily range and volume pass: the range comes from highs and lows and answers "how wide is the noise?"; volume counts shares and answers "how busy and how easy to fill?"

Dropping a duplicate loses no information. It removes one source of "the lines disagree" and makes the chart faster to read on a tired day.

The momentum gauge from A momentum gauge and the overbought myth describes how one-sided the last 10 days were. On a chart that already has an average, ask what it adds.

Nora's Bluefin Energy data on Pebble: the gauge read 70 or more on 14 days, mostly in April. The first such reading came on 2026-04-08 with the close at 48.92. The close kept climbing to 53.08 on 2026-04-24: (53.08 − 48.92) ÷ 48.92 × 100 ≈ 8.5%. Nora says she would have sold on every one of those days.

So the gauge described the April climb well and timed nothing. Mostly, it told the same story the average did: the price had been rising. Keep it only if you specifically want that "speedometer" reading and you won't treat 70 as a sell button. Many traders drop it for a cleaner chart, and they lose no signal by doing so.

Of all the tools on a chart, only a measure of volatility answers the practical question "how far away does my stop have to be?" A stop, as in The stop: where it goes and why, marks where the idea is wrong; volatility tells you how far ordinary noise reaches, so the stop can sit outside it.

The last row of Nora's Bluefin Energy data on Pebble, 2026-06-19: close 51.72, 20-day average 51.24, gauge 47, 10-day average range 1.39.

• The average says the backdrop is roughly flat. It doesn't say where noise ends.
• The gauge says the last 10 days were balanced. Same problem.
• The range says an ordinary day spans about 1.39. A stop about two ranges away is 2 × 1.39 = 2.78.

Two ranges is a plain habit, not a law; a level on the chart may justify a different distance. What matters is that the distance comes from the share's own noise, not from a fixed number of cents.

Once the range has set the stop distance, the share count follows from fixed dollar risk, the method from Position size from risk and stop. The tools on the chart play no further part.

Nora's account on Pebble holds 10,000 practice dollars, and she risks 1%: 100 dollars. A round trip costs about 3 dollars, so 97 dollars can go to the stop distance.

• Stop distance: 2 × 1.39 = 2.78.
• Shares: 97 ÷ 2.78 ≈ 34.9, rounded down to 34.
• Check: 34 × 2.78 = 94.52, plus 3 of costs = 97.52.

34 shares feels small because Bluefin Energy is jumpy, but the dollars at risk are the same as on any other trade, and that is the number that matters. Two limits stay: a gap can open beyond the stop and make the loss bigger, and none of this says whether the trade is a good idea at all.

A defensible toolkit has at most three tools, each with its own job, and you can say what each one can't do. One example for Nora's Bluefin Energy chart:

• The 20-day average: is the backdrop rising, flat or falling? It lags and whipsaws in a range.
• The average daily range: how far is ordinary noise? It sets the stop (2.78) and, with fixed risk, the size (34 shares). It has no direction.
• Volume, as a check on conditions: a spike sends you to the news, very thin trading warns of poor fills. It doesn't show who was right.

Two good tools beat three. Dropping the volume check, or the average, is fine if you know why. What a toolkit can never do is tell you what happens next; evidence that any combination of these lines forecasts prices after costs is weak.

How it fits together: each tool answers one question about the past; duplicates add clutter, the range sets the stop, fixed risk sets the size. Module 7, How do I turn an idea into a plan I can test?, starts with A one-page trading plan that writes these choices down.