You'll Never Know by Hi-Gloss first appeared on the Israeli foreign-music chart on 12 Oct 1981, entering at #32. It peaked at #25 on 9 Nov 1981. In total it spent 5 weeks on the chart, last charting on 16 Nov 1981.
| Wk | Date | Pos |
|---|---|---|
| 1 | 12 Oct 1981 | 32 |
| 2 | 26 Oct 1981 | 30 |
| 3 | 2 Nov 1981 | 26 |
| 4 | 9 Nov 1981 | 25 |
| 5 | 16 Nov 1981 | 37 |