4. Realtime vs Delayed Data

Charts can update live as new bars arrive. How fresh those updates are depends on your provider and plan.

Streaming updates

When a stream is available, the latest bar updates in place as trades come in, and a new bar is appended when the interval rolls over. The candle info line and any indicators recompute against the forming bar.

Massive: realtime or delayed

For Massive (equities), the websocket feed can be realtime or delayed:

• Realtime — live updates, for realtime data plans.
• Delayed — delayed updates, for delayed plans.

Set the default feed with the MASSIVE_STOCKS_WS_FEED / NEXT_PUBLIC_MASSIVE_STOCKS_WS_FEED environment variables, and override it per browser under Settings → Data provider → Massive → Streaming. Choose delayed if your Massive plan is delayed; use realtime (or omit it) for realtime plans. See Configuring Providers & API Keys.

Binance: public realtime

Binance crypto data streams from public Spot websocket endpoints in realtime, with no key or plan selection required.

Forming vs. confirmed bars

The most recent bar is forming until its interval closes, after which it is confirmed. Studies and strategies distinguish the two so a signal on the live bar is understood as provisional until the bar closes — relevant when authoring indicators and strategies.

Next steps

You have covered data and symbols. Next, organize symbols with watchlists.

Next: Watchlists Overview