SPY, Oct 1, 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 1, 2026
Closed: Oct 1, 2026
Quantity: 83
Entry price: 760.360241
Exit price: 760.62494
Exit by: signal
Book value at entry: $44,890.81

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: $63,109.90
Exit value: $63,131.87
P&L: −$21.97
Dividends: —
P&L with dividends: —
Costs: $1.16
Net P&L: −$23.13
Return: −0.03%
Of the book: −4.9 bp
R multiple: —
Held: 89.9 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 1, 2026	10:30 ET	sell	83	83	760.360241	760.61	—	+3.3 bp	—	—	short in: 760.61 < band 761.05	8 trigger numbers at 10:30 lb 761.0495850199137 px 760.61 ub 765.9339793740464 pos −1 vwap 762.4460830623983 reason short in: 760.61 < band 761.05 symbol SPY 1 number fills 1
exit	Oct 1, 2026	12:00 ET	buy	83	83	760.62494	760.67	—	−0.6 bp	—	signal	short out: 760.67 > min(band 760.45, VWAP 761.31)	8 trigger numbers at 12:00 lb 760.4534654750819 px 760.67 ub 766.5314433789927 pos 0 vwap 761.3064143571537 reason short out: 760.67 > min(band 760.45, VWAP 761.31) symbol SPY 1 number fills 1

Role	Side	Kind	Qty	Limit	Model price	Status	Filled	Average	Sent (ET)	Filled (ET)
entry	sell	market	83	—	760.61	filled	83	760.360241	10:30 ET	10:30 ET
exit	buy	market	83	—	760.67	filled	83	760.62494	12:00 ET	12:00 ET

Span: 91 minutes
High: 762.18
Low: 758.7901
Best point (MFE): +0.21%
Worst point (MAE): −0.24%
Bars from: SIP 1-minute bars

Matched the account: yes
Entry: 760.50 at 10:30 ET
Exit: 760.67 at 12:00 ET
Exit by: —
The rule's day: −0.0%
The rule's trades that day: 1

side: −1
symbol: SPY
exit_min: 720
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: null
leverage: 2.8384707437968015
prev_close: 762.63
sigma_10:00: 0.0015936243218458515

SPY · Noise area

The trade

Result

Entry and exit

Orders

Path while held

The rule's own trade

Notes