Blog

Notes from building.

Methodology, market commentary, and occasional rants about scanner pricing. Posts are short. Newest first. RSS.

July 29, 2026 · Tapeline

How to Read a Stock Chart: Price, Volume, Trend, Support

A stock chart is a compressed record of every transaction ever made in one stock — not a prediction of the next one. This guide breaks down the four things every chart actually shows: price, volume, trend, and the support, resistance, and moving-average lines traders draw on top. Each is taught honestly — including where it quietly lies — and connected to how Tapeline's Trend factor reads the same structure.

July 29, 2026 · Tapeline

How to Use MACD: The Indicator Explained (Line, Signal, Histogram)

MACD is the most-screenshotted indicator in trading and the most misread. Here's how the MACD indicator is actually built — the line, signal, and histogram — what crossovers and divergence mean, and where it whipsaws in choppy markets. Then, honestly, how Tapeline reads the same trend and momentum ideas underneath it as two separate factors.

July 29, 2026 · Tapeline

Best Technical Indicators for Swing Trading: An Honest Read

"Best technical indicators for swing trading" is the wrong question — no indicator predicts, they only describe. Here's an honest walk through RSI, moving averages, relative strength, and volume: what each actually measures, where it goes quiet, and how Tapeline folds the trend and relative-strength reads into named factors instead of a single line on a chart.

July 29, 2026 · Tapeline

Bollinger Band Squeeze: How to Find a Volatility Contraction

A Bollinger Band squeeze is when a stock's volatility bands pinch tight — the classic sign that a large move may be loading. But a squeeze tells you when something might happen, never which way, and the fakeouts are brutal. Here's how to spot a genuine volatility contraction, why it fires false signals, and how Tapeline reads the directional context around it — descriptively, with no dedicated "squeeze" score.

July 29, 2026 · Tapeline

Stock Rating Systems: Descriptive vs Prescriptive Labels

A stock rating can tell you what to do, or it can tell you what's true — and those are very different products. This post breaks down descriptive rating systems versus prescriptive buy/sell verdicts: the cognitive traps a verdict hides, the legal line it crosses, and why Tapeline's labels describe a state instead of issuing a command.

July 29, 2026 · Tapeline

AI Stock Scanner: The Case for Seeing the Formula and the Losses

"AI stock scanner" has become a marketing label, not a disclosure — most tools that wear it will show you the winners and hide the formula. This is the honest case for the opposite: a published methodology and a public scorecard that includes the trades it got wrong. Transparency isn't an edge, but opacity should be a red flag.

July 29, 2026 · Tapeline

Sector Rotation Strategy: How to Read What's Leading (Q3 2026)

Sector rotation sounds like a strategy but is really an observation — which of the eleven GICS sectors the market has been favouring, and which it has left behind. Heading through Q3 2026, here is how to read sector leadership honestly: regime first, then Relative Strength by sector, without pretending anyone can forecast the next rotation. It connects that read to Tapeline's Macro factor and per-sector pages.

May 21, 2026 · Tapeline

How to evaluate a stock scanner you can actually trust (5 criteria most fail).

Every stock scanner claims to beat the market. Almost none publish a daily, append-only, back-checked track record you can audit. Here are the five tests we'd put any scanner through before paying — and how to read between the lines when the answers get vague.

May 20, 2026 · Tapeline

What is RSI in stocks? A retail trader's plain-English guide (with examples).

RSI stands for Relative Strength Index — a 0–100 momentum oscillator that signals overbought vs oversold conditions. Here's how it actually works, what the 70/30 thresholds mean, and the three mistakes retail traders make using it.

May 20, 2026 · Tapeline

How to find momentum stocks (without buying every spike).

Momentum investing rewards stocks where price is sustainably accelerating up. The problem: pure 'biggest movers' lists are mostly noise. Here's how to filter for real momentum, including the three confluence checks that separate runners from head-fakes.

May 20, 2026 · Tapeline

What's the best time to buy stocks? The data answer (it's not what you'd think).

Retail trading folklore says 'buy at the open', 'wait until the last hour', or 'never on Mondays'. We pulled the data on intraday + day-of-week + month-of-year patterns. Here's what actually holds up — and what's just superstition.

May 20, 2026 · Tapeline

Best stock scanner under $30/month in 2026 (honest cost-quality breakdown).

We benchmarked the four sub-$30/mo stock scanners retail traders actually consider in 2026 — Finviz Elite, Stock Rover Essentials, Zacks Premium, and Tapeline Pro — across feature depth, data freshness, and (the part nobody else publishes) whether the picks beat SPY. Here's the honest matrix.

May 20, 2026 · Tapeline

How to read SEC Form 4 insider buying (and what's actually a signal).

SEC Form 4 — the filing every corporate insider must submit within 2 business days of a trade — is the rawest 'smart money' signal retail traders can access. But 90% of Form 4 activity is noise. Here's how to filter for the 10% that matters, and how Tapeline's Smart Money sub-score does it automatically.

May 13, 2026 · Tapeline

What 'Smart Money' actually means in the Tapeline Score (and why it's not what you think).

'Smart money' is the most misused phrase in retail finance. It's not influencer alpha, not the latest hedge-fund headline, not yesterday's CNBC clip. Here's what Tapeline's Smart Money factor — one of the six — actually measures, what the data sources are, and where the lags lie.

May 13, 2026 · Tapeline

Stock Screener vs Stock Scanner: What's the Difference?

'Screener' and 'scanner' aren't synonyms — one gives filters, the other a verdict. Which you need, and where Finviz fits, decides which tool you keep.

May 12, 2026 · Tapeline

Reading a Tapeline Score: a 10-minute walkthrough on $NVDA.

Most scanner scores are a number with no instructions. This is the opposite: a worked example on NVIDIA showing what each of the six factors is saying, how to read the radar, and when the composite is telling you the trade is harder than it looks.

May 3, 2026 · Tapeline

How to evaluate a stock scanner: 5 questions before you pay.

Most scanner sales pages are 50 filters and a screenshot. Here are the five questions that actually predict whether a tool will be useful in six months — and how Finviz, Trade Ideas, Zacks, and Tapeline answer them.

May 3, 2026 · Tapeline

What our signal labels mean: HIGH CONVICTION through WEAK.

Six descriptive labels, no buy/sell language. Here's what each one represents in the underlying score, why we picked descriptive words, and what it means when a ticker moves between them.

May 3, 2026 · Tapeline

Why we score 2,500 tickers, not 5,000.

A third-party market-data feed covers thousands of US tickers. We actively score ~2,500 by daily dollar-volume — here's why that cutoff exists, what we do with the rest, and why bigger isn't better.

May 2, 2026 · Tapeline

Our methodology is public. Here's why that matters.

Every other prosumer score-per-ticker tool hides its methodology as IP. We name all six factors and publish a per-pick scorecard — because the day the score stops working, you should know to leave.