Pick. Prove. Let it run.
The whole product is three honest steps. You pick a few companies or a theme. Stax builds the plan and proves it on years of real market prices. Then the plan trades on its own while you read every move it makes.
“Apple, Costco, Visa. Be careful with it.”
You say it in a sentence. Buddi writes the rules.
Five real years replayed, fees included, verdict in plain words.
Bought COST · monthly review
It trades practice cash. Every move carries its reason.
Start with what you know.
A few companies you believe in is a real starting point. Stax handles everything after it.
Evidence before commitment.
No plan runs anywhere until it has survived years of real prices with fees counted.
Delegation with receipts is different.
The plan does the daily work, and every single trade carries a reason you can read.
Tell Buddi what you believe in.
Type company names, a theme, or just how careful you want to be. Buddi checks the facts on every company you mention, suggests steadier ones where yours look fragile, and writes the full set of trading rules in plain words.
More on building by chatI believe in Apple, Costco and Visa. Nothing crazy, I just want them handled properly.
Good starting three. All of them make real profit and carry manageable debt. I would add two similar steady companies so one bad month cannot drag the whole account. Want me to build the plan?
Yes. Be careful with it.
Careful five-stock plan
ready to test- Holds 5 stocks: AAPL, COST, V and two similar steady companies
- Reviews them once a month and replaces any that weaken
- Sells a stock once its loss reaches 10%
- No stock can take more than a quarter of the account
Simulated account
$13,850
started with $10,000 · five years · fees included
vs. just buying the S&P 500
shown side by side
The verdict, in plain words: this plan grew a $10,000 practice account to $13,850 over five real years, and you can open every one of its 214 trades to see why it bought or sold.
- 5 years
- of real prices
- 1,258
- trading days simulated
- 214
- trades, each with its reason
- Next-day prices
- no hindsight allowed
Watch the plan survive real history.
One tap replays your plan over years of real market prices. Trades fill at the next morning’s price, fees come out of every trade, and eight independent checks audit the run. You get the verdict in plain words, next to what just buying the S&P 500 would have done.
More on the history testLet it trade. Read every move.
The plan runs in a practice slot first, trading simulated cash on real prices. Open the monitor whenever you like: every buy and sell is there with its reason, in sentences. When you trust it, connecting real money is a separate, deliberate step.
More on auto-tradingSteady large caps
$10,486
simulated cash · started with $10,000 · fees included
Recent trades, newest first
- Tue
Sell Sold NKE at $71.40
Its loss reached 10%, the plan’s selling rule.
- Mon
Buy Bought AVGO at $168.22
It passed every filter on the monthly review day.
- Fri
Sell Sold half of COST at $612.05
The stock grew past 20% of the account, so the plan trimmed it back.
Tap any trade in the app to see the rule that fired, the fill price, and the account after.
The numbers behind it
- 3
- steps from a hunch to a running plan
- 5+ years
- of market history available for the proof
- 6
- free practice slots from day one
Past performance is evidence about a plan, never a promise about the future. Stax shows you both sides of that line.
Questions people ask
How long does the whole path take?
About twenty minutes the first time: a short chat, a history test that runs in seconds, and a practice deployment that starts the same day. After that the plan works and you check in when you like.
Where does real money enter?
Only where you deliberately put it. Everything on the free path runs on simulated cash. Connecting a brokerage account is its own step, on the highest tier, and never happens by default.
What if I want to change the plan later?
Tell Buddi in a sentence. The rules update, the plan re-tests so the change proves itself, and your earlier versions stay comparable so the market can settle any argument.
Is the optimizer a different tool?
No. Tuning a plan is the same engine running many history tests and keeping the versions that held up. One engine does the proving everywhere in Stax.
Twenty minutes from now, a tested plan can be practicing.
Free to build, free to prove, free to practice. No card.