Our Desk
The three parts of the HarmonyStocks engine: the Scanner reads every pool, the Router builds the cycle, the Settler flashes, repays and splits.
The Scanner reads every pool of every stock in one Multicall3 call: price, tick and both balances. It prices each pool in dollars, with ETH from the WETH/USDG pool, sets aside pools too thin to trade and hands the Router a live spread for each stock.
Reads 136 pools in one call
Docs
The Router turns a spread into a cycle: buy in the cheap pool, sell in the rich one, end where it started. Routes start in USDG or WETH and run over two to four distinct pools; a stock quoted in both crosses through the WETH/USDG pool. Every size is checked against the engine's own exact quote.
Up to 4 hops, back to where it began
Docs
The Settler runs the cycle in one transaction. It swaps with the first pool, spends the output in the next, repays the first pool from the proceeds and splits what is left: 90% to you, 10% to the protocol. No profit, no transaction: it reverts.
Keeps 10% of profit, nothing on a loss
DocsWe are a small desk with one rule: the engine does the work, in public. No order flow, no private relay, no spread kept in a back office. Every cycle is a transaction anyone can read.
We start where the gap starts. Robinhood Chain lists stocks as tokens, and Uniswap v3 lists each of them again and again: in USDG and in WETH, at four fee tiers. We read all of it every few seconds and show you what we see, including the gaps that do not pay.
We care about exact more than fast. A quote in the app is the engine's own answer against live pool state, not an estimate. When it is not positive, the button says so and stays off.
We want every gap closed by whoever gets there first. That includes you, your bot, and other bots. Profit is never promised: when somebody closes the gap before you, your cycle reverts and costs only gas.
A cycle that does not end with more than it started reverts. The worst case is the gas.
The first pool lends the first leg for the length of the transaction. You send nothing but the transaction itself.
Every pool on a route must be the pool the Uniswap v3 factory lists for its pair and fee.
Every token on the path is USDG, WETH or a Robinhood stock token, recognised by its contract code, never by its ticker.
The engine ends every transaction empty and never grants an allowance. There is no vault to drain.
The protocol takes 10% of the profit of a cycle and nothing else. The contract caps it at 20%.
Uniswap v3 on Robinhood Chain · snapshot Sep 18, 2026
NVDA5 poolsNVIDIA
GLD6 poolsSPDR Gold Trust
SPY4 poolsSPDR S&P 500 ETFNo account, no deposit, no allow list. Open the app, pick a stock, read the exact quote and run the cycle from any wallet on Robinhood Chain.
Launch App