So I've installed the latest version of Optiforge, Optifine and Forge, I put Optiforge in my mods folder and Optifine in my versions folder, but Optiforge keeps saying I don't have optifine installed when I do.

Same problem here. Tried many combos of Forge from version 37.0.45 up and all current Optifine versions including the pre.
Installed correctly.

After OptiFine 1.17.1 HD U H1 pre2, you no longer need to installing OptiFine directly

ZekerZhayard is correct, OptiForge is back to loading OptiFine from the mods folder instead of the launcher profile. I've confirmed this myself with the latest versions of Forge, OptiFine, and OptiForge (37.0.82, H1_pre5, and 0.1.1 respectively.) I've actually made a pull request that updates the readme to accurately reflect the correct install instructions, which can be viewed here:

#93

ZekerZhayard is correct, OptiForge is back to loading OptiFine from the mods folder instead of the launcher profile. I've confirmed this myself with the latest versions of Forge, OptiFine, and OptiForge (37.0.82, H1_pre5, and 0.1.1 respectively.)

Ok this works thanks very much

ZekerZhayard is correct, OptiForge is back to loading OptiFine from the mods folder instead of the launcher profile. I've confirmed this myself with the latest versions of Forge, OptiFine, and OptiForge (37.0.82, H1_pre5, and 0.1.1 respectively.) I've actually made a pull request that updates the readme to accurately reflect the correct install instructions, which can be viewed here:

#93

made an account just to say thank you. I couldn't figure out what was wrong