Chart course · Lesson 7 of 90

Quiz + support & resistance basics

Thu Oct 15, 2026 · PG · education only, not a Buy/Sell
PG daily chart with a green support zone near 139–142 and a red resistance zone near 153–154

Quick quiz (lessons 1–6)

All three use the PG chart above. Answer in your head first, then open the answers.

Answers
  • Q1: A long lower wick with the close in the top 5% of the day’s range means sellers pushed it down and buyers took it all back. It happened right inside the support zone, which is what makes it a hammer in context instead of just a big wick. The gap down didn’t follow through; it was fully filled on Sep 23.
  • Q2: Sideways. Highs kept stalling around $153–154 and lows kept holding around $139–142, so there was no stair-step of higher highs and higher lows, or lower highs and lower lows. Before Mar 18 it was a downtrend from the $167.25 high on Feb 27.
  • Q3: A common gap. It was inside a range, volume was only modestly above average, it closed well off the open, and it filled within three sessions (Apr 29 low $145.89). It also ran straight into the ceiling area; the high was $152.42.

The one idea

Support is a price area where buyers have stepped in again and again. Resistance is an area where sellers have capped the price again and again. They exist because people remember prices: buyers who missed the last low want in at that price again, and holders stuck from a high want out at break-even. Think of them as zones, not razor-thin lines.

How to draw them

What to look at on PG

Rule of thumb

Before any trade, mark the nearest support below and the nearest resistance above. If price is close to support, your stop can sit just under the zone and the risk is small. If price is jammed up under resistance, the room to run is small. If it sits in the middle, wait. A break counts when a candle closes clearly beyond the zone, ideally on above-average volume, and then holds over the next few sessions.

Common mistake

Drawing the level to the penny and treating a small poke through it as a breakdown. On Jun 1, PG slipped to $138.86, a bit under the cluster of earlier lows, and closed at $140.28, still inside the zone. Anyone who sold that “break” sold close to the low: four sessions later, on Jun 5, it closed at $146.54. A zone is allowed to be a little messy. Wait for a decisive close beyond it.

Try it

Open the RSKD daily chart for the last six months. Mark the one clearest floor and the one clearest ceiling, and count how many times each was tested. Then answer one question: is RSKD at an edge right now, or in the middle of its range?

Charts use real Yahoo daily data. Part of Invest’s 90-day chart course.