Volume & money flow · daily rule · Industrials & rentals
Money Flow Index on WillScot
WSC 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 $10,000 since 2015
Log scale. After trading costs, with T-bill interest while out.
The record
The play against buying and holding WSC over exactly the same dates, after costs.
| Play, since 2015 | Hold, since 2015 | Play, 5 yrs | Hold, 5 yrs | |
|---|---|---|---|---|
| Annual return | +7.0% | +5.7% | +11.9% | −11.4% |
| Total return | +108% | +81% | +75% | −45% |
| Worst drawdown | −69.3% | −71.5% | −29.9% | −71.5% |
| Volatility | 31.7% | 40.1% | 30.5% | 41.8% |
| Sharpe ratio | 0.30 | 0.28 | 0.40 | −0.17 |
| Time invested | 41% | 100% | ||
| Switches per year | 4.3 | 0 |
Every call, graded
Right on 25 of 47 closed calls (53%). In calls averaged +4.2%; out calls saw WSC move +2.4% on average.
| Called | Call | Price | Until | WSC moved | Result |
|---|---|---|---|---|---|
| Aug 28, 2026 | IN | $20.83 | now | −17.0% | open |
| Apr 24, 2026 | OUT | $22.52 | Aug 28, 2026 | −7.5% | ✓ right |
| Nov 21, 2025 | IN | $17.38 | Apr 24, 2026 | +29.6% | ✓ right |
| Jul 11, 2025 | OUT | $29.91 | Nov 21, 2025 | −41.9% | ✓ right |
| Mar 10, 2025 | IN | $29.21 | Jul 11, 2025 | +2.4% | ✓ right |
| Dec 9, 2024 | OUT | $37.80 | Mar 10, 2025 | −22.7% | ✓ right |
| Oct 15, 2024 | IN | $35.54 | Dec 9, 2024 | +6.4% | ✓ right |
| Sep 3, 2024 | OUT | $36.48 | Oct 15, 2024 | −2.6% | ✓ right |
| Aug 16, 2024 | IN | $35.28 | Sep 3, 2024 | +3.4% | ✓ right |
| Jul 24, 2024 | OUT | $40.14 | Aug 16, 2024 | −12.1% | ✓ right |
| Jun 12, 2024 | IN | $37.71 | Jul 24, 2024 | +6.4% | ✓ right |
| May 22, 2024 | OUT | $39.56 | Jun 12, 2024 | −4.7% | ✓ right |
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 48 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.