SPY, Oct 16, 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 16, 2026
Closed: Oct 16, 2026
Quantity: 111
Entry price: 768.787568
Exit price: 763.392343
Exit by: close
Book value at entry: $46,683.99

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: $85,335.42
Exit value: $84,736.55
P&L: +$598.87
Dividends: —
P&L with dividends: —
Costs: $1.55
Net P&L: +$597.32
Return: +0.70%
Of the book: +128.3 bp
R multiple: —
Held: 269 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 16, 2026	11:30 ET	sell	111	111	768.787568	768.77	—	−0.2 bp	—	—	short in: 768.77 < band 769.42	8 trigger numbers at 11:30 lb 769.4242699338508 px 768.77 ub 775.6101746800932 pos −1 vwap 771.2117078860642 reason short in: 768.77 < band 769.42 symbol SPY 1 number fills 1
exit	Oct 16, 2026	15:59 ET	buy	111	111	763.392343	—	763.25	—	+1.9 bp	close	out by a market order sent at 15:59:00, for the rule's exit at the official close	5 trigger numbers at 15:59:00 held −111 note SPY: out at market for the close (-111 held) event close_phase symbol SPY 1 number fills 1

Role	Side	Kind	Qty	Limit	Model price	Status	Filled	Average	Sent (ET)	Filled (ET)
entry	sell	market	111	—	768.77	filled	111	768.787568	11:30 ET	11:30 ET
exit	buy	market	111	—	—	filled	111	763.392343	15:59 ET	15:59 ET

Span: 270 minutes
High: 769.53
Low: 760.64
Best point (MFE): +1.06%
Worst point (MAE): −0.10%
Bars from: SIP 1-minute bars

Matched the account: yes
Entry: 768.745 at 11:30 ET
Exit: — at 16:00 ET
Exit by: —
The rule's day: +3.1%
The rule's trades that day: 2

side: −1
symbol: SPY
exit_min: 960
entry_min: 690

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: 3.6920928364489822
open.note: SPY: open 773.24, previous close 771.79, leverage 3.69, 111 shares a leg
open.open: 773.24
open.event: open
prev_close: 771.79
open.shares: 111
open.symbol: SPY
sigma_10:00: 0.0012088167690916252
open.leverage: 3.6920928364489822
open.prev_close: 771.79

SPY · Noise area

The trade

Result

Entry and exit

Orders

Path while held

The rule's own trade

Notes