| Index range | Meanings |
| 0.8 ≤ TC < 1 | Very strong comparative advantage |
| 0.5 ≤ TC < 0.8 | Stronger comparative advantage |
| 0 ≤ TC < 0.5 | Weak comparative advantage |
| −0.5 ≤ TC < 0 | Weak comparative disadvantage |
| −0.8 ≤ TC < −0.5 | Stronger comparative disadvantage |
| 1 ≤ TC < −0.8 | Very strong comparative advantage |