Song: "That's Your Secret"
Artist: Sea Level
Peak position on the Cashbox Singles chart: #53
Number of weeks on the Cashbox Singles chart: 12
(11 weeks in the Top 100)
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| February 25, 1978 | 110 | That's Your Secret | Sea Level | Capricorn 0287 |
| March 4, 1978 | 96 | That's Your Secret | Sea Level | Capricorn 0287 |
| March 11, 1978 | 93 | That's Your Secret | Sea Level | Capricorn 0287 |
| March 18, 1978 | 88 | That's Your Secret | Sea Level | Capricorn 0287 |
| March 25, 1978 | 78 | That's Your Secret | Sea Level | Capricorn 0287 |
| April 1, 1978 | 69 | That's Your Secret | Sea Level | Capricorn 0287 |
| April 8, 1978 | 64 | That's Your Secret | Sea Level | Capricorn 0287 |
| April 15, 1978 | 60 | That's Your Secret | Sea Level | Capricorn 0287 |
| April 22, 1978 | 58 | That's Your Secret | Sea Level | Capricorn 0287 |
| April 29, 1978 | 53 | That's Your Secret | Sea Level | Capricorn 0287 |
| May 6, 1978 | 60 | That's Your Secret | Sea Level | Capricorn 0287 |
| May 13, 1978 | 100 | That's Your Secret | Sea Level | Capricorn 0287 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.