| Oldstem vs Clive | 23–30 | 43.40% |
| Oldstem vs Hwoarang | 16–19 | 45.71% |
| Oldstem vs Reina | 22–12 | 64.71% |
| Oldstem vs Lili | 12–21 | 36.36% |
| Oldstem vs Dragunov | 9–22 | 29.03% |
| Oldstem vs Law | 7–23 | 23.33% |
| Oldstem vs Kazuya | 14–11 | 56.00% |
| Oldstem vs Jun | 10–13 | 43.48% |
| Oldstem vs Xiaoyu | 8–10 | 44.44% |
| Oldstem vs Asuka | 7–10 | 41.18% |
| Oldstem vs King | 2–14 | 12.50% |
| Oldstem vs Yoshimitsu | 3–9 | 25.00% |
| Oldstem vs Alisa | 6–6 | 50.00% |
| Oldstem vs Azucena | 4–8 | 33.33% |
| Oldstem vs Paul | 1–10 | 9.09% |
| Oldstem vs Lars | 3–8 | 27.27% |
| Oldstem vs Steve | 4–6 | 40.00% |
| Oldstem vs Jack-8 | 5–5 | 50.00% |
| Oldstem vs Nina | 6–4 | 60.00% |
| Oldstem vs Victor | 2–8 | 20.00% |
| Oldstem vs Heihachi | 3–7 | 30.00% |
| Oldstem vs Bryan | 0–9 | 0.00% |
| Oldstem vs Leo | 1–8 | 11.11% |
| Oldstem vs Claudio | 0–8 | 0.00% |
| Oldstem vs Eddy | 2–6 | 25.00% |
| Oldstem vs Jin | 2–5 | 28.57% |
| Oldstem vs Kuma | 4–1 | 80.00% |
| Oldstem vs Zafina | 0–3 | 0.00% |
| Oldstem vs Feng | 0–2 | 0.00% |
| Oldstem vs Shaheen | 2–0 | 100.00% |
| Oldstem vs Lee | 2–0 | 100.00% |
| Oldstem vs Panda | 0–2 | 0.00% |
| Oldstem vs Lidia | 2–0 | 100.00% |
| Oldstem vs Devil Jin | 0–1 | 0.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.