What Reference Price Is Used for Buying or Selling US Stocks on Pluang?
The price shown on a US Stock's asset page outside trading hours is the last price traded on the exchange during the most recent regular session. Once the exchange opens, that price moves continuously to follow live exchange price movements, including during pre-market and post-market trading hours. The Advanced Chart menu, however, only plots price movements during regular trading hours, so it can still serve as a useful reference for gauging buy or sell levels, but you should keep in mind that your actual execution price is whatever the asset trades at the moment your order is actually filled — not necessarily the price you last saw displayed before you tapped buy or sell on your screen moments earlier, especially in a fast-moving market.
Outside trading hours: The displayed price reflects the last traded price from the most recent regular session on the exchange — it is a snapshot, not a live quote, since the market is closed.
During trading hours: The price updates continuously to follow real exchange price movements, including additional trading hours like pre-market and post-market sessions, giving you a closer approximation of where the asset is actually trading in real time.
Advanced Chart limitation: The Advanced Chart only records and displays price movements during regular trading hours — it does not plot pre-market or post-market price action, even though the asset page's headline price does reflect those sessions.
Why the reference price isn't your guaranteed execution price: The price you see is a reference for planning your buy or sell decision, but the actual price you pay or receive is determined at the moment your order executes, which can differ from the last displayed price depending on market movement and liquidity between when you view the price and when your order fills.
Related questions:
Q: Why does the price on the asset page look different from the price on the Advanced Chart?
The asset page's headline price includes pre-market and post-market movements when the exchange is in extended hours, while the Advanced Chart only plots regular trading hours. This means the two can diverge temporarily during pre-market or post-market sessions, even though they represent the same underlying stock, which is normal behavior rather than a data error on either screen and is expected during extended-hours sessions.
Q: Is the price I see right before I place an order the price I'll actually pay?
Not necessarily — the displayed price is a reference point, but your actual execution price is set at the moment your order is filled on the exchange. If the market moves between when you view the price and when your order executes, or if liquidity is thin, your final price can differ from what you last saw on screen, sometimes by a noticeable margin during fast-moving markets.
Q: Does the reference price update in real time when the US market is open?
Yes — during regular trading hours (and extended pre-market/post-market sessions), the price on the asset page continuously follows live exchange movements. It is only outside of any trading session, such as on weekends or holidays, that the price freezes at the last traded level from the most recent session until the next session begins and fresh trades start coming in.
Q: Can I use the Advanced Chart to plan trades during pre-market or post-market hours?
The Advanced Chart itself won't show you pre-market or post-market price movement since it only records regular trading hours, so for those specific windows you'll need to rely on the live price shown on the main asset page instead, which does reflect extended-hours activity as it happens, unlike the chart itself, which will simply look flat and unchanged during those hours.