The correlation between Cost and xpm is 0.69. The more Cost, the more xpm, and vice versa. But some values are higher than expected, some are lower. Efficiency is a difference between the value of xpm depending on Cost (blue dots) with respect to the expected value (red line).
| Efficiency | |
|---|---|
| Bottle | 115.5253 |
| Power Treads | 104.3519 |
| Boots Of Travel 2 | 98.9526 |
| Boots Of Travel | 92.8186 |
| Butterfly | 90.7582 |
| Satanic | 90.2873 |
| Nullifier | 86.6023 |
| Swift Blink | 84.7827 |
| Wraith Band | 83.4829 |
| Eye Of Skadi | 79.9127 |
| Skull Basher | 77.2456 |
| Battle Fury | 72.1257 |
| Diffusal Blade | 67.1286 |
| Monkey King Bar | 66.8882 |
| Phase Boots | 66.3109 |
| Mask Of Madness | 64.6283 |
| Orb Of Corrosion | 64.4089 |
| Disperser | 63.2584 |
| Falcon Blade | 62.6196 |
| Moon Shard | 62.2468 |
| Aghanim'S Shard | 62.0119 |
| Manta Style | 59.8583 |
| Abyssal Blade | 59.2487 |
| Sange And Yasha | 56.0182 |
| Daedalus | 55.5178 |
| Soul Ring | 51.0523 |
| Dragon Lance | 48.8356 |
| Desolator | 47.4925 |
| Mage Slayer | 46.8886 |
| Linken'S Sphere | 42.9383 |
| Kaya And Sange | 37.9782 |
| Harpoon | 36.0526 |
| Black King Bar | 35.7599 |
| Blade Mail | 35.0632 |
| Revenant'S Brooch | 33.5174 |
| Bloodstone | 33.4077 |
| Assault Cuirass | 32.7982 |
| Hand Of Midas | 32.6683 |
| Crystalys | 31.8697 |
| Witch Blade | 31.6971 |
| Mjollnir | 29.9388 |
| Armlet Of Mordiggian | 28.5673 |
| Bracer | 28.4029 |
| Shiva'S Guard | 28.0989 |
| Yasha And Kaya | 22.3082 |
| Silver Edge | 20.2327 |
| Heart Of Tarrasque | 19.9699 |
| Radiance | 19.1673 |
| Echo Sabre | 15.7486 |
| Hurricane Pike | 14.0525 |
| Bloodthorn | 13.4512 |
| Overwhelming Blink | 12.9927 |
| Magic Wand | 12.5565 |
| Eternal Shroud | 9.6508 |
| Null Talisman | 9.4429 |
| Blink Dagger | 3.6036 |
| Octarine Core | 2.4683 |
| Aghanim'S Blessing | 1.8145 |
| Scythe Of Vyse | -0.2916 |
| Aghanim'S Scepter | -7.0895 |
| Arcane Blink | -11.5673 |
| Heaven'S Halberd | -13.9965 |
| Vanguard | -16.5585 |
| Phylactery | -18.5652 |
| Maelstrom | -19.7735 |
| Refresher Orb | -21.5801 |
| Orchid Malevolence | -23.4410 |
| Ethereal Blade | -25.0660 |
| Crimson Guard | -29.0904 |
| Gleipnir | -34.4799 |
| Meteor Hammer | -36.5790 |
| Aeon Disk | -40.6502 |
| Wind Waker | -41.2803 |
| Vladmir'S Offering | -44.0728 |
| Shadow Blade | -44.3302 |
| Veil Of Discord | -45.5586 |
| Lotus Orb | -46.7613 |
| Solar Crest | -47.6816 |
| Eul'S Scepter Of Divinity | -47.9104 |
| Tranquil Boots | -51.8611 |
| Pipe Of Insight | -53.4321 |
| Arcane Boots | -54.6663 |
| Aether Lens | -63.1768 |
| Helm Of The Dominator | -69.3450 |
| Pavise | -71.5681 |
| Urn Of Shadows | -73.2708 |
| Glimmer Cape | -79.6519 |
| Spirit Vessel | -81.5383 |
| Medallion Of Courage | -82.7412 |
| Rod Of Atos | -84.4160 |
| Force Staff | -85.0817 |
| Boots Of Bearing | -89.7057 |
| Dagon (5) | -91.3932 |
| Dagon | -94.4253 |
| Holy Locket | -96.6590 |
| Drum Of Endurance | -102.8185 |
| Dagon (2) | -126.3432 |
| Guardian Greaves | -127.8827 |
| Mekansm | -132.2517 |
| Helm Of The Overlord | -134.8809 |
| Dagon (3) | -140.3522 |
| Dagon (4) | -153.6922 |