Selecta
Journal, position sizing and statistics in one tool.
- Trading journal for every trade you take
- Position size calculated from your risk and stop
- Stats vault to see where your edge is strongest
- Measure whether your sizing adds to your edge
Execution engines built for alpha.
You know the setup. The open moves faster than your hands.
Automated and semi-automated execution software for US equities, built around your platform. For trading groups, prop firms and independent investors.
Clients
The firms we build with and for.
What we do
One focus: execution software built around your trading platform, for US equity markets.
Execution engines
Custom engines that place, size and manage orders for trades too fast or too complex to handle by hand.
Execution scripts
Automated and semi-automated scripts that turn your trading rules into consistent, repeatable execution.
Built around your platform
Each build is scoped to the platform and broker you use, so your execution logic fits how you already trade.
From your rules to live orders
You bring the strategy. We turn it into software that carries it out the same way every time.
Your strategy
Rules, signals and sizing logic.
Codified and tested
Built and validated by Polarity.
Precise execution
Fast and consistent, on your platform.
Our goal: take human latency and inconsistency out of execution, so you can focus on finding edge.
Products
Proprietary tools built in-house and adapted to each client through a custom build.
Orbius
Early accessAn execution engine for trades too fast or complex to place by hand.
- Connects to Interactive Brokers today
- Carries out the trade specifics you define
- Acts at machine speed when timing matters
- Reduces manual error under pressure
Not sure which fits? Talk it through with us.
Book a free 15-minute callSee it working
Two tools, one workflow: Selecta tells you which setups are worth trading, Orbius executes them.
Orbius
From the pre-market check to the closed trade.
Every order, stop and target in one view.
Each ticker on the watchlist shows where it stands: waiting for the open, order placed, or in position.
- Entry, stop, breakeven and target levels per ticker
- Stop moved to breakeven and part sold at target, automatically
- Risk on each position in dollars and as % of NAV
The gap, classified before the bell.
Your pivots and trend lines from the chart, checked against the pre-market price and the previous session.
- Screw, pivot and trend-line gaps, up and down
- The levels it jumped, with the distance
- One click pre-fills the order ticket
| Symbol | Previous session | Pre-market | Gap | Gap type | |
|---|---|---|---|---|---|
| CRWDNASDAQ | 412.30 -1.2%H 418.90 · L 409.75 | 431.80 | +4.7% | TRL gap upTRL1 425.60Pivot gap upP1 428.00 | ChartTicket |
| SHOPNASDAQ | 96.40 -2.6%H 99.10 · L 95.80 | 101.25 | +5.0% | Screw gap upPrev high 99.10 | ChartTicket |
| ARMNASDAQ | 148.70 +1.8%H 150.20 · L 145.10 | 141.95 | -4.5% | UTL gap downUTL1 145.40Pivot gap downP1 143.00 | ChartTicket |
| DDOGNASDAQ | 128.15 +0.6%H 129.40 · L 126.90 | 129.05 | +0.7% | no gap type | ChartTicket |
Every trade, planned against actual.
Fills come straight from the broker. Each trade keeps its plan, its result and your review.
- Planned and actual entry, stop, risk and slippage
- Grade, notes and screenshots on every trade
- Statistics by setup, grade, side and exchange
Know the data is good before you trust it.
Feed speed for every symbol, broker response times and the clock, measured all session.
- Update and lag times per symbol, in milliseconds
- Clock checked against the broker's time
- Every connection event logged and kept
OVERALLOK
BROKER RESPONSE4 / 9 / 21 ms
DATA FARMS3 / 3 OK
CLOCK vs BROKER+0.03 s
WORST SYMBOLARM 182 ms
SESSION06:41 up
CRWDupd 38/94 · lag 61/120
SHOPupd 44/101 · lag 58/133
ARMupd 112/182 · lag 70/141
DDOGupd 51/97 · lag 66/128
AMDupd 29/80 · lag 49/111
MUupd 33/88 · lag 52/117
09:29:58OKfeed 6 symbols · broker 4/9 ms
09:30:00OKofficial open received for 6 / 6
09:31:12SLOWARM updates 182 ms (p95) - watching
09:31:40OKback to normal
09:30:00OKofficial open received for 6 / 6
09:31:12SLOWARM updates 182 ms (p95) - watching
09:31:40OKback to normal
Selecta
Find your edge, then keep it.
Every setup you took, with its chart.
A visual library of your trades, grouped by setup. Paste a screenshot, tag it, and find it again in seconds.
- Tagged by setup, exchange and outcome
- Filter to compare winners and losers side by side
- Linked to the trade's row in the Tracker
TRL gap upTopping resistance line
Opens above the rising line through the tops.
DTL gap upDescending trend line
Opens above the falling line through the tops.
Pivot gap upHorizontal pivot
Opens above a level that capped price before.
Screw gap upPrevious day reversed
After a down day, opens above that day's high.
See where your edge really is.
Results broken down the way you trade, so you keep what works and drop what doesn't.
- Win rate, expectancy and profit factor by setup
- By exchange, direction, entry time and hold time
- Equity curve and drawdown
Plan for the bad path, not the average.
Your trades reshuffled thousands of times, to show the range of results the same edge could produce.
- Median, 5th and 95th percentile results
- The drawdown to size for
- Chance of a losing run of the same length
Every trade with its plan and result.
Entry, stop, risk and R for each trade, with the summary figures always on top.
- Exchange filled in automatically
- Filter by exchange, setup and side
- Plans for the next session in the Planner
TRADES66
WIN RATE41%
AVG WIN / LOSS2.6R / 1.0R
EXPECTANCY+0.48R
PROFIT FACTOR1.8
| Date | Ticker | Exch | Side | Setup | Entry | Stop | Risk | R |
|---|---|---|---|---|---|---|---|---|
| 06-12 | NVDA | Nasdaq | Long | TRL Gap | 142.35 | 139.80 | $300 | +3.1R |
| 06-11 | SHOP | Nasdaq | Long | Screw Gap | 101.40 | 99.55 | $250 | -1.0R |
| 06-10 | ARM | Nasdaq | Short | UTL Gap | 141.90 | 144.20 | $300 | +2.2R |
| 06-09 | CRWD | Nasdaq | Long | Pivot Gap | 431.95 | 426.10 | $200 | 0.0R |
| 06-06 | DDOG | Nasdaq | Long | Pivot Gap | 129.30 | 127.60 | $250 | -1.0R |
Platforms
Connectivity on demand to any of the platforms below.
About
Built by someone who has run the desks it serves.
Polarity Analytics builds execution software for US equities. It comes from years inside prop desks and brokerage operations, where a late order, a wrong risk limit or a routing fault has a direct cost.
Yurii Kitikari, CMT, CFTe
Founder
Yurii has built and run US equity prop desks and brokerage operations since 2014. Orbius and Selecta run daily in Yurii's own trading, so problems are found in live markets, not only in simulation.
PlatformsImplemented DAS, Lightspeed and Sterling from scratch. Supports Takion, Silexx and Vega.
RiskRuns server-side buying power, risk limits and exchange entitlements.
ExecutionChecks order routing directly with the clearing broker.
TeamsHas built and trained trading and support teams of 5 to 20+.
- CMT
- CFTe
- CySEC Advanced
- CISI International Introduction to Investment Award
- CISI Level 2 Award in Fundamentals of Financial Services
Writing: Discipline and Proprietary Trading Chronicles: Management
Connect on LinkedInWho we build for
Traders who already have rules and want them carried out without manual delay or inconsistency.
Trading groups
One execution process, applied the same way across your traders.
Prop firms
Execution and risk rules that hold across the whole desk.
Independent investors
Your own rules, carried out consistently and without hesitation.
How we work
From first call to live execution in three stages. Every project follows the same process, so the logic is clear before any code is written.
- Written specification Minimum 1 weekWe document your entry and exit rules, position sizing and risk limits, and find the discretionary steps that can become rules. You receive a written specification of what the software must do.
- Complexity and workload estimate Minimum 1 weekWe map the specification to your platforms, brokers and data feeds, then assess technical complexity, integration points, latency requirements and edge cases. Before development starts, you receive a fixed scope, a timeline and a quote.
- Development and testing Minimum 1 week, depending on scopeWe build the engine or script to the agreed specification, then test it in simulation, on a demo account and in live market conditions at limited size. You receive the finished software with documentation, and support during the first live sessions.
Most projects take three weeks or more from first call to delivery, depending on complexity.
The first stage starts with your rules.
Send us your rulesBuilt with guardrails
Controls in Orbius that keep execution inside the limits you set.
Limits before the order
Risk and buying-power limits you set are checked before an entry order is placed.
Size follows your risk
Position size is worked out from your dollar risk and the distance to the stop.
No acting on stale prices
If prices stop updating while it waits for a setup, the engine pauses and raises an alert.
A full record
Decisions and order events are logged with timestamps, so every action can be reviewed.
These controls reduce operational error. They do not remove trading risk, and they do not replace your own oversight of live positions.
Questions
How long does a project take?
Most projects take three weeks or more from first call to delivery. Each of the three stages takes at least a week, and development depends on the scope you agree.
Which platforms can you connect to?
We offer connectivity on demand to Interactive Brokers, DAS Trader, Sterling Trading Tech, Takion, MetaQuotes and TradeStation. Tell us what you use, and we will confirm the details during scoping.
How is the software tested before it trades?
We test it in simulation, on a demo account and in live market conditions at limited size before it runs at full size.
Do you guarantee trading results?
No. We build and test execution software, and trading always involves risk, including the loss of capital. Past results do not guarantee future results.
Is this investment advice?
No. We do not tell you what to trade. Our software carries out rules you define.
Book your free 15-minute consultation call.
Pick a time that suits you, and we will go through what can be automated. Prefer to write? Send us your rules using the form.
Book a free 15-minute callOr email [email protected]