Portfolio Sweepwatch & learn · not investment advice

Learn, in plain English

Short, calm explainers for people learning to watch stocks, ETFs, and crypto — the same concepts the Portfolio Sweep app uses every day, written the way the app explains them. Free to read, free to print, no account.

Start here on a red day

Before you react: three questions

The printable one-pager to pull up when something you watch drops and your thumb starts moving. Print it, keep it near the screen.

The concepts

Every concept the app rotates as its daily card lives here permanently — read them in any order, or work through the list top to bottom.

What is an ETF?

A single basket holding many investments at once — the calmest place most beginners start.

The 200-day average

The slow trend line that says whether the long-term drift is up or leaning down.

The 50-day average

The faster trend line — dropping below one it held is called breaking support.

RSI, the momentum gauge

A 0–100 gauge for whether something just rose fast or fell hard.

“Is it just the market?”

The first question to ask when something drops: did everything drop, or just this?

Volatility

How jumpy a price normally is — so a routine swing is not mistaken for news.

Support

The level a price keeps bouncing off — and what it means when it stops bouncing.

Dollar-cost averaging

Investing a fixed amount on a schedule, so timing the market is not the job.

The full A–Z list is the plain-English glossary.

One worksheet to tie it together

Understand any investment in five questions

A printable worksheet on Portfolio Sweep's framework: trend, market context, momentum, volatility — and your actual reason.

Portfolio Sweep checks these concepts for you on your own list, every day. Start a free watchlist →

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Last reviewed: November 8, 2026

Portfolio Sweep never gives buy or sell calls. It describes what prices are doing — trend, momentum, how it compares to the market — so you can learn and decide for yourself. You don't trade inside Portfolio Sweep. This page is education, not investment advice.