Portfolio composer
A book that says what to own
Conviction-ranked, diversified, and capped per name and per class. Not a watchlist, an actual allocation.
DELLBULL9%
SNOWBULL9%
Daily cross-asset system
App + public API
Market signals, portfolio targets, and an API.
Meridian reads hundreds of assets with OpenLL, our open-source alternative to the Larsson Line indicator, then ranks established trends and composes a daily target book.
OpenLL is independently developed and designed to be practically identical in calculation behavior. It is not created by, affiliated with, or endorsed by CTO Larsson. Read the exact calculation and source code →
Meridian
/
Portfolio
OpenLL
Illustrative model target
What to own, recomposed daily.
Holdings
14
Conviction
88%
Breadth
61%
Drift band
10%
Allocation~31.2% historical DD ref.
◼ Stocks 82%◼ ETFs 18%
1DELLBULL9%
2DDOGBULL9%
3SNOWBULL9%
4AXONBULL9%
5HOODBULL8%
+ 9 more holdingsFull target & evidence →
OPENLL DAILY·
CRYPTO·STOCKS·ETFs·BONDS·COMMODITIES·
21 TARGET BOOKS·
AGENT API · PUBLIC·
ORANGE OPENLL + VWAP · BTC + ETH·
DAILY FLIP CHANNEL·
PERSONAL PORTFOLIO BOT·
2:00 investor demo
See the whole system move.
Follow Meridian from cross-asset signals and asset analysis through portfolio construction, holdings onboarding, Orange strategies, the Agent API, and Meridian Portfolio Bot.
Real Meridian interface · narrated investor walkthrough · Watch on YouTube ↗
Historical research uses current survivors and can overstate results. Not financial advice.
How Meridian works
From raw market data to a plan you can act on.
Four steps run once per day. The same current model target is available in Meridian, through the agent API, and through the personalized Portfolio Bot.
01Signal
Read the regime
OpenLL (EMA 30/60 with ATR bands) tags every asset BULL, BEAR or NEUTRAL. It is the only cross-asset signal model.
Calculation and reference code →
BULL
NEUTRAL
BEAR
02Rank
Score conviction
Four pillars, Band, Shape, Support and Momentum, rank the whole universe strongest to weakest.
Band
Shape
Support
Momentum
03Compose
Build the book
Pick one of 21 allocation levels. The composer builds a diversified target and shows the observed historical drawdown for context.
14 names · max 15% each · capped per class
04Plan
Map to your goal
Import holdings for actual orders, query targets from an agent, or follow a chosen target through the personalized Portfolio Bot.
Need11.2%/yr
On tracklevel 50
What's inside
One model, three ways to use it.
Work in the dashboard, connect a software agent, or subscribe to the changes that matter. Every surface reads the same daily OpenLL target.
Goal planner
Will you actually hit your number?
Set a target and a date. Meridian solves the return you need, shows three outcomes, and selects an allocation level. Pure math, no LLM.
Conservative
$182k
Base
$251k
Optimistic
$338k
Allocation control
Choose from 21 books
Move from defensive to aggressive and compare each book with its observed research drawdown.
calm~-31% maxbold
Signal model
Built for software agents
Read the exact OpenLL methodology, current signals, drawdown choices, and the current target book as JSON.
GET /api/agent/book
Bring your portfolio
Screenshot to holdings
Snap your broker screen, run one AI prompt, paste the result. Meridian rebalances from your real positions.
1 · snap→2 · prompt→3 · import
@MeridianPortfolio_bot
Your chosen target book in Telegram
DM the interactive bot, choose the portfolio level you want to follow, check its current target, and receive a personal alert only when that model target moves beyond the 10% drift band.
/portfolioPick your level
/bookShow current target
Backtest
Research for every book
All 21 allocation choices publish CAGR, max drawdown, and Sharpe beside SPY, with limitations attached.
21
books
Orange strategy
A specialist for BTC and ETH
BTC and ETH each run two specialist timing strategies: OpenLL and anchored VWAP.
BTC × 2ETH × 2OpenLL + VWAP
Coverage
Hundreds of assets across five classes, one framework.
The S&P 500 universe, large-cap crypto, ETFs, bonds and commodities refresh once a day at 00:00 UTC.
Crypto
Stocks
ETFs
Bonds
Commodities
Agent API · public testing
Give your agent a current market model, not another pile of candles.
The API returns decision-ready JSON: the exact OpenLL calculation, current regimes and flips, 21 research-backed allocation choices, and today's target book.
Public and unauthenticated during testing.
No candles, historical indicator series, user holdings, or hidden curve payloads.
Book orders compare today's target with the previous daily target and only emit above the shared 10% drift band.
Join the managed API waitlist
Keys, service tiers, and pricing are not live yet. Join the separate Meridian API list and we'll tell you when managed access opens.
One email when managed access opens. No market spam.
api.meridian / v1
no auth
GET /aboutModel rules, evidence boundaries, and version→
GET /signalsCurrent regimes, breadth, and flips across five classes→
GET /drawdowns21 choices with aggregate research comparisons→
GET /bookCurrent target, cash, changes, and rebalance decision→
$ curl https://app.getmeridian.xyz/api/agent/book?dd=31.24
{
"drawdown_selection": "exact",
"book": { "positions": [...], "cash_weight": ... },
"rebalance_from_previous_daily_target": {
"policy": "aggregate_drift_strictly_above_10_pct"
}
}
Research, not promises
The evidence is published with the limits left on.
Each allocation choice reports its observed return, drawdown, and Sharpe beside SPY. The default level is shown here; the API exposes all 21 choices.
22.15%
Annualized
31.24%
Max drawdown
1.06
Sharpe
Default level 50, research window Jan 2000 to Jul 2026. SPY measured 8.26% annualized, 55.19% max drawdown, and 0.51 Sharpe. Current-survivor research can overstate results; observed drawdown is not a loss cap or forecast.
Normalized research comparison
2000 → 2026, default level 50
Meridian 22.15%/yr
SPY 8.26%/yr
Telegram · choose your service
Two ways to stay connected.
Read the market's latest flips in a public feed, or follow a specific model portfolio through a private, interactive bot.
Public · read-only
Daily signal channel
Latest market flips, once daily.
The public channel posts the latest market flips every day. Subscribe so you do not miss a signal.
DeliveryOne public post per day
You decideRead and react
Subscribe to daily flips
t.me/LarssonLineFree
Private · interactive
@MeridianPortfolio_bot
Follow your chosen target book.
Choose the model portfolio level you want to follow. The bot remembers your selection, shows its current target, and sends personal alerts when that target moves beyond the 10% drift band.
/portfolioChoose your level
/bookShow its current target
AlertsPersonal target changes
Open your Portfolio Bot
t.me/MeridianPortfolio_bot
Use it today
Open the app. Connect an agent. Follow the target.
Meridian is free to use, and the agent API is open during public testing. Managed API access and pricing will come later.
Estimates from history. Not financial advice.