The short answer
WebSockets are useful for low-latency streaming updates when a marketplace supports them; polling is simpler and more predictable where streaming is unavailable. A hybrid monitor can use both while applying the same deduplication and buy rules.
Key takeaways
- Choose the transport based on marketplace support, latency needs, and rate limits.
- Use reconnect backoff and stale-data detection for streams.
- Keep decision logic and duplicate protection consistent across both modes.
Both WebSocket and polling can be effective. The right choice depends on marketplace support, rate limits, and the sensitivity of your strategy.
WebSocket strengths
- Lower latency for fast-changing listings.
- Fewer repetitive requests once connected.
- Better fit for high-frequency alerting.
Polling strengths
- Simpler to implement and debug.
- Predictable request cadence.
- Works even where streaming is unavailable.
Hybrid approach
For most users, hybrid works best: stream where supported, poll elsewhere, and standardize decision logic across both paths.
Key tuning variables
- Polling interval by item volatility.
- Reconnect backoff strategy for dropped streams.
- Unified deduplication to avoid repeated buys.
Choose reliability first, then optimize for speed.
Frequently Asked Questions
Is WebSocket or polling better for CS2 price monitoring?
WebSocket is generally better for supported low-latency updates, while polling is easier to operate and works where streaming is unavailable. A hybrid approach is often practical.
What are the risks of WebSocket market monitoring?
Dropped connections, reconnect storms, stale state, and duplicated events can create bad decisions unless the client uses backoff, freshness checks, and deduplication.
How should polling intervals be chosen?
Set the interval based on item volatility, API limits, and the value of faster detection. Avoid polling so aggressively that it causes throttling or unstable behavior.