Oh, sorry, you wanted wn8 win rate? There is no such macro. You can use only these:
Macros available in hangar
Legend:
TC - tank carousel
SQ - squad window
'X' - available
' ' - not available (can return wrong value - '', 'NaN', 'undefined', ...)
'.' - TODO
'-' - Obsoleted (will be replaced with other macro)
┌────────────────────────────┬───┬───┬─────────────────────────────────
│ macro │ TC│ SQ│ Description
├────────────────────────────┼───┼───┼─────────────────────────────────
│ {{v.vehId}} │ X │ . │ vehicle id
│ {{v.battles}} │ X │ . │ total battles count for current vehicle
│ {{v.c_battles}} │ X │ . │ color for battles count
│ {{v.kb}} │ X │ . │ number of kilo-battles for current vehicle
│ {{v.hb}} │ X │ . │ number of hecto-battles for current vehicle (hecto = 100)
│ {{v.wins}} │ X │ . │ total wins count for current vehicle
│ {{v.mastery}} │ X │ . │ mastery sign for current vehicle
│ {{v.xp}} │ X │ . │ average XP gained on current vehicle
│ {{v.fullname}} │ X │ . │ localized full vehicle name
│ {{v.name}} │ X │ . │ localized compact vehicle name
│ {{v.sysname}} │ X │ . │ vehicle system name (usa-M24_Chaffee)
│ {{v.shortname}} │ X │ . │ localized short vehicle name
│ {{v.type}} │ X │ . │ vehicle type (text substitution from config)
│ {{v.c_type}} │ X │ . │ color for vehicle type
│ {{v.level}} │ X │ . │ vehicle level (Arabic numerals)
│ {{v.rlevel}} │ X │ . │ vehicle level (Roman numerals)
│ {{v.battletiermin}} │ X │ . │ minimal vehicle battle tier
│ {{v.battletiermax}} │ X │ . │ maximal vehicle battle tier
│ {{v.nation}} │ X │ . │ vehicle nation
│ {{v.premium}} │ X │ . │ 'premium' for premium, empty for normal vehicle
│ {{v.elite}} │ X │ . │ 'elite' for elite, empty for normal vehicle
│ {{v.maxHP}} │ X │ . │ maximum vehicle health points
│ {{v.hitsRatio}} │ X │ . │ percent of hits
│ {{v.c_hitsRatio}} │ X │ . │ dynamic color for this macro
│ {{v.winrate}} │ X │ . │ vehicle win rate (percent of wins on this vehicle)
│ {{v.c_winrate}} │ X │ . │ color for win rate
│ {{v.tdb}} │ X │ . │ average damage - damage / battles
│ {{v.c_tdb}} │ X │ . │ dynamic color for this macro
│ {{v.tdv}} │ X │ . │ average damage efficiency - damage / (battles * maxHP)
│ {{v.c_tdv}} │ X │ . │ dynamic color for this macro
│ {{v.tfb}} │ X │ . │ average frags per battle
│ {{v.c_tfb}} │ X │ . │ dynamic color for this macro
│ {{v.tsb}} │ X │ . │ average number of spotted enemies per battle
│ {{v.c_tsb}} │ X │ . │ dynamic color for this macro
│ {{v.wn8expd}} │ X │ . │ WN8 expected tank damage
│ {{v.wn8effd}} │ X │ . │ WN8 effective tank damage (avgdmg / expected_dmg)
│ {{v.c_wn8effd}} │ X │ . │ dynamic color for this macro
│ {{v.earnedXP}} │ X │ . │ earned XP
│ {{v.marksOnGun}} │ X │ . │ marks on gun
│ {{v.damageRating}} │ X │ . │ damage rating in percents for marks on gun
│ {{v.c_damageRating}} │ X │ . │ dynamic color for this macro
│ {{v.teff}}, {{v.e}} │ . │ . │ player's per-vehicle efficiency
│ {{v.c_e}} │ . │ . │ dynamic color for this macro
│ {{v.equipment1}} │ . │ . │ small icon of equipment in 1st slot
│ {{v.equipment2}} │ . │ . │ small icon of equipment in 2nd slot
│ {{v.equipment3}} │ . │ . │ small icon of equipment in 3rd slot
│ {{v.consumable1}} │ . │ . │ small icon of consumable in 1st slot
│ {{v.consumable2}} │ . │ . │ small icon of consumable in 2nd slot
│ {{v.consumable3}} │ . │ . │ small icon of consumable in 3rd slot
│ {{v.xpForTop}} │ . │ . │ XP points required for top tank
│ {{v.xpForExpert}} │ . │ . │ XP points required for expert tank
│ {{v.shootRange}} │ . │ . │ actual shoot range
│ {{v.viewRange}} │ . │ . │ actual view range
│ {{v.dpm}} │ . │ . │ actual damage per minute
│ {{v.gunAvgDamage}} │ . │ . │ average damage for current gun AP/CR/HE
│ {{v.gunAvgHit}} │ . │ . │ average penetration for current gun AP/CR/HE
│ {{v.gunDispersion}} │ . │ . │ base dispersion at 100 m for current gun
│ {{v.gunAimingTime}} │ . │ . │ base aiming time for current gun
│ {{v.selected}} │ X │ . │ 'sel' for selected, empty for others
│ {{l10n:ID}} │ . │ . │ localizated text, see en.xc for id
└────────────────────────────┴───┴───┴─────────────────────────────────