Open any chart. The bars at the bottom showing volume? Most traders treat them like wallpaper. They check if "volume looks high" and move on.

That's like reading a book by looking at the page numbers.

Volume is the only indicator on a chart that isn't derived from price. Everything else — RSI, MACD, moving averages — is just math on price. Volume is the actual footprint of every dollar that changed hands. Learn to read it and you'll see the market the way institutions do.

Raw Volume Is Useless. Relative Volume Is Everything.

"AAPL traded 80 million shares today." Cool. Is that a lot? You have no idea unless you know what AAPL usually trades. Apple's 30-day average is around 55 million. So 80M is roughly 1.45x average — meaningful, but not screaming.

Relative volume (RVol) is today's volume divided by the 20-day average at the same point in the day. That's the number that matters. Anything 2x and above means something happened — news, an earnings beat, a sweep order, an institution unloading.

Rules I trade by:

  • RVol < 0.7 — Skip it. Nothing's happening. The stock is on autopilot.
  • RVol 1.0-1.5 — Normal day. Setups still work but don't expect explosive moves.
  • RVol 2-3x — Institutional interest. This is where my best swing setups come from.
  • RVol >4x — Something's broken or breaking. Either earnings, a halt, or news. Slow down and figure out what before clicking buy.

The Volume Dry-Up Before the Move

Here's the counterintuitive part: the best breakouts almost always come after a series of low-volume days. Not high.

When a stock pulls back on quietly declining volume — three, four, five days of below-average bars — that means sellers are exhausted. Nobody left to sell. The float gets tight. Then one catalyst hits and the move is violent because there's nothing to absorb the buying.

Look back at any major breakout you wish you'd caught. I'll bet money the three days before the move had below-average volume. That's your signal that pressure is building.

Climax Volume = Exit Signal

The opposite is also true. When you see a stock that's been ripping for weeks suddenly print 4-5x volume on a big up bar — especially a wide-range bar that closes near the lows of the bar — that's climax volume. Last buyers in. Smart money is unloading into retail euphoria.

If you're long, that's your sign to take profits or trail your stop tight. The party's usually over within a week.

How MAC Terminal Helps

Every Scanner result shows RVol prominently. The compression scoring system actively rewards stocks where volume has been drying up — that's baked into the algorithm. When you see a setup with score 80+ and RVol of 0.6, that's the textbook coiled spring. The Scanner found it for you. Your job is to wait for the trigger.