SPY, Sep 30, 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: Sep 30, 2026
Closed: Sep 30, 2026
Quantity: 81
Entry price: 768.426667
Exit price: 767.93
Exit by: signal
Book value at entry: $45,000.00

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: $62,242.56
Exit value: $62,202.33
P&L: −$40.23
Dividends: —
P&L with dividends: —
Costs: $1.13
Net P&L: −$41.36
Return: −0.06%
Of the book: −8.9 bp
R multiple: —
Held: 90 minutes

Role	Date	At (ET)	Side	Qty	Asked	Price	Rule's price	Close	Slippage	Against the close	How	Why	The rule's numbers
entry	Sep 30, 2026	11:00 ET	buy	81	81	768.426667	768.525	—	−1.3 bp	—	—	long in: 768.52 > band 768.08	8 trigger numbers at 11:00 lb 762.5319739439087 px 768.525 ub 768.0828498425136 pos 1 vwap 767.7171526932802 reason long in: 768.52 > band 768.08 symbol SPY 1 number fills 1
exit	Sep 30, 2026	12:30 ET	sell	81	81	767.93	768.18	—	+3.3 bp	—	signal	long out: 768.18 < max(band 768.58, VWAP 768.02)	8 trigger numbers at 12:30 lb 762.0404888903275 px 768.18 ub 768.5757562281653 pos 0 vwap 768.0207923529646 reason long out: 768.18 < max(band 768.58, VWAP 768.02) symbol SPY 1 number fills 1

Role	Side	Kind	Qty	Limit	Model price	Status	Filled	Average	Sent (ET)	Filled (ET)
entry	buy	market	81	—	768.525	filled	81	768.426667	11:00 ET	11:00 ET
exit	sell	market	81	—	768.18	filled	81	767.93	12:30 ET	12:30 ET

Span: 91 minutes
High: 769.245
Low: 767.75
Best point (MFE): +0.11%
Worst point (MAE): −0.09%
Bars from: SIP 1-minute bars

Matched the account: yes
Entry: 768.5282 at 11:00 ET
Exit: 768.07 at 12:30 ET
Exit by: —
The rule's day: −0.1%
The rule's trades that day: 3

side: 1
symbol: SPY
exit_min: 750
entry_min: 660

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

inputs

open: null
leverage: 2.765850580621067
prev_close: 764.2
sigma_10:00: 0.001565079800155078

SPY · Noise area

The trade

Result

Entry and exit

Orders

Path while held

The rule's own trade

Notes