SPY, Oct 8, 2026 · Trading desk

Paper trading, not investment advice. Every account and book on these pages trades paper money: the Alpaca paper accounts DAILY ($1,000,000 from Sep 30, 2026), INTRA1 ($100,000 from Sep 30, 2026) and INTRA2 ($100,000 from Sep 30, 2026); the simulated books SIM-TT ($100,000 from Sep 29, 2026), SIM-V2B ($100,000 from Sep 28, 2026) and SIM-V2B-TOM ($100,000 from Sep 28, 2026), filled at the official close; and market-analysis's ledgers, one contract per position against a $100,000 reporting equity. No real money is at stake. Positions, trades and P&L are published the same day, as the engines record them, with each number's source and cost model labelled. Nothing here is a recommendation to buy, sell or hold any security, and nothing is tailored to you. Each strategy is a pre-registered experiment, read once on a date or at a trade count fixed in advance; until then its record says little either way. I may hold or have held positions in securities shown here. Markets can and do lose money.

Account: INTRA2
Strategy: Noise area
Book: noise
Symbol: SPY
Asset class: equity
Side: short
Exposure: short
Status: closed
Opened: Oct 8, 2026
Closed: Oct 8, 2026
Quantity: 95
Entry price: 771.12
Exit price: 773.25
Exit by: signal
Book value at entry: $45,855.39

Record Trade journal

Cost model

Alpaca paper fills, with no commission; Alpaca's SEC and CAT fees, charged by the day, are left out. Commission is estimated at $0.007 a share a side, the rate at the owner's own broker: the net P&L is the P&L less it; the P&L, the return, the P&L in basis points of the book and the R multiple are before it. The rule book's day return is the rule's own replay on SIP bars, after the research's own costs: $0.0035 a share a side in commission for the noise area and $0.007 for the other rules, and a cent a share of slippage on every fill except a resting limit order's and the noise area's exit at the close.

Entry value: $73,256.40
Exit value: $73,458.75
P&L: −$202.35
Dividends: —
P&L with dividends: —
Costs: $1.33
Net P&L: −$203.68
Return: −0.28%
Of the book: −44.1 bp
R multiple: —
Held: 60 minutes

Role	Date	At (ET)	Side	Qty	Asked	Price	Rule's price	Close	Slippage	Against the close	How	Why	The rule's numbers
entry	Oct 8, 2026	13:30 ET	sell	95	95	771.12	771.07	—	−0.6 bp	—	—	short in: 771.07 < band 772.27	8 trigger numbers at 13:30 lb 772.2669661768508 px 771.07 ub 779.8309282176726 pos −1 vwap 774.3566094973116 reason short in: 771.07 < band 772.27 symbol SPY 1 number fills 1
exit	Oct 8, 2026	14:30 ET	buy	95	95	773.25	773.36	—	−1.4 bp	—	signal	short out: 773.36 > min(band 772.42, VWAP 773.91)	8 trigger numbers at 14:30 lb 772.415703670819 px 773.36 ub 779.681739637573 pos 0 vwap 773.9102089883337 reason short out: 773.36 > min(band 772.42, VWAP 773.91) symbol SPY 1 number fills 1

Role	Side	Kind	Qty	Limit	Model price	Status	Filled	Average	Sent (ET)	Filled (ET)
entry	sell	market	95	—	771.07	filled	95	771.12	13:30 ET	13:30 ET
exit	buy	market	95	—	773.36	filled	95	773.25	14:30 ET	14:30 ET

Span: 61 minutes
High: 773.80
Low: 770.86
Best point (MFE): +0.03%
Worst point (MAE): −0.35%
Bars from: SIP 1-minute bars

Matched the account: yes
Entry: 771.08 at 13:30 ET
Exit: 773.34 at 14:30 ET
Exit by: —
The rule's day: −0.4%
The rule's trades that day: 2

side: −1
symbol: SPY
exit_min: 870
entry_min: 810

the noise-area rule on SPY and QQQ: checks on the half hour 10:00-15:30, out at the close

inputs

open.at: 10:00:04
leverage: 3.225576657126942
open.note: SPY: open 774.87, previous close 777.22, leverage 3.23, 95 shares a leg
open.open: 774.87
open.event: open
prev_close: 777.22
open.shares: 95
open.symbol: SPY
sigma_10:00: 0.0015508569081226695
open.leverage: 3.225576657126942
open.prev_close: 777.22

SPY · Noise area

The trade

Result

Entry and exit

Orders

Path while held

The rule's own trade

Notes