Fri 13 mirror

A case on CSGORUN (friday13), first seen 12 Nov 2026. Every value is CSGORUN's own item price.

Price
$4.13
Advertised RTP
94.00%
EV $3.88 from 40 items
Observed RTP, 30d
89.44%
352 openings, odds method
Variance
0.7×
of price², per opening
Tail share
29.5%
of openings carry half the EV
Below price
50.0%
of openings return less than the price

Advertised vs observedper window, 95% band and the advertised marker

observed, 95% bandadvertisedoutside bandsmall sample
24 hours
89.44%±8.78352 openings
7 days
89.44%±8.78352 openings
30 days
89.44%±8.78352 openings
since tracking started
89.44%±8.78352 openings
80.0%89.5%99.0%

Windowsthe test per window

WindowOpeningsObservedDev.Method
24h35289.44%±8.78−1.0σodds
7d35289.44%±8.78−1.0σodds
30d35289.44%±8.78−1.0σodds
All35289.44%±8.78−1.0σodds
Enough sample: 100 openings and 5 expected rare hits (odds method) or 1,000 openings (sample method).

Items, odds and values40 items · odds sum to 1 · observed counts over 581 openings, 30 days

Share of the expected value, most valuable first; colour is the item's rarity.
ItemOddsValueEV shareObservedExpectedHot / cold
★ M9 Bayonet | Bright Water (Factory New)knife · covert1 in 1,000,000$4160.0%00.0—
P250 | Whiteout (Factory New)weapon · mil spec1 in 500,000$2890.0%00.0—
AK-47 | Black Laminate (Factory New)weapon · mil spec1 in 250,000$2230.0%00.0—
Tec-9 | Whiteout (Factory New)weapon · restricted1 in 142,857$1630.0%00.0—
★ Broken Fang Gloves | Jade (Minimal Wear)gloves · extraordinary1 in 52,632$1170.1%00.0—
P2000 | Silver (Minimal Wear)weapon · mil spec1 in 23,256$88.800.1%00.0—
AK-47 | Nightwish (Minimal Wear)weapon · red1 in 10,000$67.170.2%00.1—
★ Bowie Knife | Bright Water (Field-Tested)knife · gold1 in 4,717$52.300.3%00.1—
★ Shadow Daggers | Bright Water (Minimal Wear)knife · covert1 in 2,179$40.450.5%00.3—
MAG-7 | Prism Terrace (Factory New)weapon · restricted1 in 1,056$31.760.8%00.6—
AWP | Chrome Cannon (Field-Tested)weapon · red1 in 717$27.921.0%00.8—
Glock-18 | Mirror Mosaic (Factory New)weapon · rare1 in 343$21.831.6%21.71.18×
AK-47 | Ice Coaled (Factory New)weapon · Legendary1 in 139$14.292.6%14.20.24×
MAG-7 | Silver (Minimal Wear)weapon · industrial1 in 118$13.192.9%44.90.82×
Glock-18 | Mirror Mosaic (Minimal Wear)weapon · pink1 in 72$10.283.7%108.11.24×
Five-SeveN | Nightshade (Factory New)weapon · mil spec1 in 56$9.094.2%1410.31.35×
AK-47 | Ice Coaled (Minimal Wear)weapon · Legendary1 in 43$7.954.8%913.50.67×
AUG | Arctic Wolf (Factory New)weapon · restricted1 in 34$7.075.4%1717.11.00×
Nova | Red Quartz (Minimal Wear)weapon · Restricted1 in 27$6.296.0%1921.60.88×
Glock-18 | Mirror Mosaic (Field-Tested)weapon · pink1 in 20$5.466.9%2828.60.98×
Glock-18 | Wraiths (Factory New)weapon · blue1 in 20$5.417.0%3629.21.23×
Galil AR | Shattered (Field-Tested)weapon · Rare1 in 19$5.307.1%3530.41.15×
Sawed-Off | Mosaico (Field-Tested)weapon · Industrial Grade1 in 17$4.977.6%3634.61.04×
MP9 | Arctic Tri-Tone (Factory New)weapon · restricted1 in 16$4.887.8%4335.91.20×
AK-47 | Ice Coaled (Field-Tested)weapon · Legendary1 in 12$4.199.0%3948.70.80×
Nova | Ghost Camo (Factory New)weapon · mil spec1 in 29$2.532.3%1820.40.88×
Five-SeveN | Nightshade (Minimal Wear)weapon · mil spec1 in 29$2.512.3%2420.41.18×
Tec-9 | Whiteout (Field-Tested)weapon · Mythical1 in 29$2.362.1%1920.30.94×
MP9 | Arctic Tri-Tone (Field-Tested)weapon · violet1 in 29$2.192.0%2220.11.09×
SCAR-20 | Stone Mosaico (Field-Tested)weapon · Consumer Grade1 in 29$2.171.9%1820.10.90×
CZ75-Auto | Silver (Factory New)weapon · light blue1 in 29$1.831.6%2119.81.06×
AUG | Arctic Wolf (Field-Tested)weapon · restricted1 in 30$1.711.5%1719.70.86×
M4A1-S | Night Terror (Factory New)weapon · #8847ff1 in 30$1.631.4%1419.60.71×
SSG 08 | Ghost Crusader (Field-Tested)weapon · #8847ff1 in 30$1.251.1%2019.21.04×
SG 553 | Phantom (Field-Tested)weapon · violet1 in 31$1.131.0%1619.00.84×
Tec-9 | Ice Cap (Factory New)weapon · mil spec1 in 31$1.060.9%1518.90.79×
Glock-18 | Wraiths (Minimal Wear)weapon · 11 in 31$1.010.8%1018.80.53×
MP9 | Broken Record (Factory New)weapon · #4b69ff1 in 32$0.700.6%3118.21.70×
UMP-45 | Arctic Wolf (Minimal Wear)weapon · Mythical1 in 32$0.700.6%1718.20.93×
Dual Berettas | Cobalt Quartz (Factory New)weapon · restricted1 in 32$0.600.5%2617.91.45×
Values are CSGORUN's own item prices; EV share = odds × value ÷ EV. Hot / cold compares observed drops of each item with odds × openings; small expected counts are left blank. Odds read from csgorun:v1/box/fri13_mirror/show, 12 Nov, 19:57 UTC.

Observed RTP over timedaily, 30 days

Observed RTP, dailyAdvertised 94.00%
No data in this window

Catalog changesprice, advertised RTP and contents, per capture

CapturedPriceAdvertisedItems
12 Nov, 17:28 UTC$4.1394.00%40
Each opening is tested against the capture in force when it happened; a price or odds change starts a new one.

listed1 3.2%covert 0.0%mil spec 12.0%restricted 15.7%extraordinary 0.0%red 0.1%gold 0.0%rare 0.3%Legendary 11.4%industrial 0.8%pink 6.3%Restricted 3.7%blue 5.0%Rare 5.2%Industrial Grade 5.9%Mythical 6.6%violet 6.7%Consumer Grade 3.5%light blue 3.4%#8847ff 6.7%#4b69ff 3.1%best hit —