My Perfect Cousin by The Undertones first appeared on the Israeli foreign-music chart on 26 May 1980, entering at #36. It peaked at #22 on 16 Jun 1980. In total it spent 6 weeks on the chart, last charting on 7 Jul 1980.
| Wk | Date | Pos |
|---|---|---|
| 1 | 26 May 1980 | 36 |
| 2 | 2 Jun 1980 | 28 |
| 3 | 9 Jun 1980 | 25 |
| 4 | 16 Jun 1980 | 22 |
| 5 | 23 Jun 1980 | 28 |
| 6 | 30 Jun 1980 | 37 |