This is a level-stakes simulation: imagine backing every ride with the same 1-unit bet at the starting price (SP). The line is the running total — rising when winners pay more than the losers cost, falling on a losing run. It measures whether blindly following this jockey would have made money, which is a tougher and more honest test than strike rate alone.
Each ride settles as:
win → + (decimal odds − 1) · lose → − 1.
So a winner at 5/1 returns +5.0 units, a winner at 2/1 returns +2.0, and every loser costs −1.0. Fractional SPs (e.g. 9/4) are converted to decimal — 9÷4 + 1 = 3.25 — before settling.
This jockey's record 4 rides with a priced SP, staking 4 units in total → a loss of -4.0 units, an ROI of -100.0% (profit ÷ total staked).
Only rides with a recorded SP are included, so the bet count here can be lower than total rides. It assumes you take SP on every ride with no selectivity — a baseline, not a betting tip. It ignores Rule 4 deductions, dead-heats, and any each-way element; a flat or rising line is the signal worth noting.
| Trainer | Rides | W | SR |
|---|---|---|---|
| Mr C I Jonker | 2 | 0 | 0.0% |
| Mr S G Tarry | 1 | 0 | 0.0% |
| Horse | Rides | W |
|---|---|---|
| Riga D'ora | 1 | 0 |
| Bid Before Sunset | 1 | 0 |
| Ice Eater | 1 | 0 |
| Oyster King | 1 | 0 |
| Date | Venue | Race | Horse | Pos | Trainer | Odds |
|---|---|---|---|---|---|---|
| 16 Nov 2019 | Turffontein | R8 — WORLD SPORTS BETTING MR 83 HANDICA… | Oyster King | 2 | Mr C I Jonker | 14/1 |
| 16 Nov 2019 | Turffontein | R7 — LONGBEACH, A SUN RESORT, MAURITIUS… | Ice Eater | 4 | Mr C I Jonker | 42/10 |
| 16 Nov 2019 | Turffontein | R6 — SUN CARNIVAL CITY FM 76 HANDICAP (… | Bid Before Sunset | 10 | — | 44/1 |
| 16 Nov 2019 | Turffontein | R5 — THE CITIZEN MR 72 HANDICAP (INT) (… | Riga D'ora | 3 | Mr S G Tarry | 22/1 |