Volume & money flow · daily rule · Industrials & materials
Money Flow Index on GFL Environmental
GFL with the play, last two years
Shading shows the play's call from the close that triggered it.
Money Flow Index (14)
Dashed lines at 20, 80.
Growth of C$10,000 since 2020
Log scale. After trading costs, with T-bill interest while out.
The record
The play against buying and holding GFL over exactly the same dates, after costs.
| Play, since 2020 | Hold, since 2020 | Play, 5 yrs | Hold, 5 yrs | |
|---|---|---|---|---|
| Annual return | +11.3% | +18.8% | +7.2% | +4.6% |
| Total return | +101% | +207% | +41% | +25% |
| Worst drawdown | −29.8% | −39.3% | −29.8% | −39.3% |
| Volatility | 21.3% | 31.1% | 20.9% | 29.0% |
| Sharpe ratio | 0.47 | 0.61 | 0.26 | 0.17 |
| Time invested | 46% | 100% | ||
| Switches per year | 2.3 | 0 |
Every call, graded
Right on 9 of 15 closed calls (60%). In calls averaged +10.4%; out calls saw GFL move +7.3% on average.
| Called | Call | Price | Until | GFL moved | Result |
|---|---|---|---|---|---|
| Sep 16, 2025 | IN | C$63.73 | now | −4.7% | open |
| Nov 27, 2024 | OUT | C$64.71 | Sep 16, 2025 | −1.5% | ✓ right |
| Sep 25, 2024 | IN | C$54.30 | Nov 27, 2024 | +19.2% | ✓ right |
| Jun 6, 2024 | OUT | C$52.56 | Sep 25, 2024 | +3.3% | ✕ wrong |
| Jun 12, 2023 | IN | C$50.37 | Jun 6, 2024 | +4.4% | ✓ right |
| Aug 17, 2022 | OUT | C$37.65 | Jun 12, 2023 | +33.8% | ✕ wrong |
| Jun 20, 2022 | IN | C$32.89 | Aug 17, 2022 | +14.5% | ✓ right |
| Apr 4, 2022 | OUT | C$39.16 | Jun 20, 2022 | −16.0% | ✓ right |
| Jan 24, 2022 | IN | C$40.78 | Apr 4, 2022 | −4.0% | ✕ wrong |
| Jun 3, 2021 | OUT | C$38.18 | Jan 24, 2022 | +6.8% | ✕ wrong |
| May 13, 2021 | IN | C$37.62 | Jun 3, 2021 | +1.5% | ✓ right |
| Sep 24, 2020 | OUT | C$26.80 | May 13, 2021 | +40.3% | ✕ wrong |
An in call is right when the price rose before the next call; an out call is right when it fell. The latest 12 of 16 calls shown.
How the play works
- In when the 14-day MFI crosses up through 20.
- Out when it crosses down through 80.
The creators also stress divergences, which this rule ignores.
The case against
Valeriy Zakamulin tested moving-average timing on up to 155 years of U.S. stock data and found no statistically significant edge in the second half of that record. The rules earned their keep in a few severe bear markets and lagged buy and hold for long stretches in between.