Robinhood Chain Slippage Error
A slippage error on Robinhood Chain (chain 4663) is the router's way of saying the executed price would have been worse than the tolerance you specified. It is a safety check, not a bug — turning that check off by raising slippage without thinking is how traders on thin pools get filled at MEV-picked prices.
This flow explains what the slippage tolerance actually controls, when it is safe to raise, and how to size trades so a modest tolerance almost always fills.
In this article, see also: check pool depth before setting slippagecompare pools for the best fillswap-failure flowno-liquidity flow.
Likely causes
The pool moved between simulation and mine because someone traded ahead of you. Your trade size is large relative to depth so real impact exceeds any reasonable tolerance. The pool is thin enough that any inbound transaction moves it materially. MEV sandwich attacks are picking off traders using wide tolerances.
Safe checks
Read the pool's current reserves on robinhoodchain.blockscout.com and compute your expected impact by hand: a 1 ETH trade against a 10 ETH pool prices dramatically worse than against a 100 ETH pool. Compare that expected impact against your slippage tolerance — a mismatch either way is a signal to change size, not tolerance.
Resolution steps
If impact math says the trade would move price by more than your tolerance, reduce size instead of raising tolerance. If impact math says the trade should fit inside tolerance but keeps failing, the pool is moving between blocks; wait or use a lower size. Only raise tolerance when depth is comfortably above your size and you have accepted the specific extra cost.
Escalation limits
There is no safe universal slippage cap. Never let a UI convince you to click 'set to 25%' for a fill — on a thin pool that becomes an invitation to be sandwiched to the cap. If a trade needs more than a few percent to fill on chain 4663, the trade probably should not happen at that size.
Prevention
Size trades to pool depth, not to portfolio size. Simulate impact before signing. Prefer routers that split fills across venues rather than punishing one thin pool with the full size.
Frequently asked questions
What is a reasonable slippage on chain 4663? There is no universal answer. Deep pools comfortably fill under 1 percent; thin pools may need more; anything above a few percent should be a deliberate decision, not a default. Does auto-slippage protect me? Only if the auto policy is conservative and considers pool depth. Auto slippage that simply raises the cap until the trade fills is not protection. Can slippage settings prevent MEV sandwiches? Lower tolerances shrink the sandwich profit but do not eliminate it. Private mempools or MEV-resistant execution paths are the actual mitigation; slippage caps are damage control.
Related
Sources checked
First-party pages used to write or verify the entries above. Vendor pages change frequently — treat each source as the authoritative reference for its own product, not this article.
- Robinhoodchain Blockscout — pool reserves— Direct source for impact math.
- Robinhood Chain docs — overview— Chain-4663 network parameters.
- Robinhood Chain docs — JSON-RPC— eth_call used by routers to price swaps.
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