SPY, Oct 5, 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: long
Exposure: long
Status: closed
Opened: Oct 5, 2026
Closed: Oct 6, 2026
Quantity: 85
Entry price: 772.679412
Exit price: 778.385177
Exit by: flatten
Book value at entry: $44,868.84

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: $65,677.75
Exit value: $66,162.74
P&L: +$484.99
Dividends: —
P&L with dividends: —
Costs: $1.19
Net P&L: +$483.80
Return: +0.74%
Of the book: +108.1 bp
R multiple: —
Held: 1,384.2 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 5, 2026	10:30 ET	buy	85	85	772.679412	772.665	—	+0.2 bp	—	—	long in: 772.66 > band 771.57	8 trigger numbers at 10:30 lb 767.7467738411605 px 772.665 ub 771.5733245542533 pos 1 vwap 771.0563199999685 reason long in: 772.66 > band 771.57 symbol SPY 1 number fills 1
exit	Oct 6, 2026	09:34 ET	sell	85	85	778.385177	—	—	—	—	flatten	closed at market by the runner: the account still held it from the session of 2026-10-05, so it sat this session out	1 number fills 1

Role	Side	Kind	Qty	Limit	Model price	Status	Filled	Average	Sent (ET)	Filled (ET)
entry	buy	market	85	—	772.665	filled	85	772.679412	10:30 ET	10:30 ET
exit	sell	market	85	—	—	filled	85	778.385177	09:30 ET	09:34 ET

Matched the account: yes
Entry: 772.67 at 10:30 ET
Exit: — at 16:00 ET
Exit by: —
The rule's day: +1.0%
The rule's trades that day: 2

side: 1
symbol: SPY
exit_min: 960
entry_min: 630

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

inputs

open.at: 10:00:05
leverage: 2.9341816545181865
open.note: SPY: open 769.68, previous close 769.64, leverage 2.93, 85 shares a leg
open.open: 769.68
open.event: open
prev_close: 769.64
open.shares: 85
open.symbol: SPY
sigma_10:00: 0.0015159094025956848
open.leverage: 2.9341816545181865
open.prev_close: 769.64

SPY · Noise area

The trade

Result

Entry and exit

Orders

The rule's own trade

Notes