A single large trader repeatedly bought and sold SNDK contracts within ten minutes, driving the price up to $1571.50 before it settled near $1560.00.
Imagine SNDK is trading quietly around $1531.10. Over the next ten minutes, a single trader enters the market and fires off 17 separate orders back-to-back, rapidly buying and selling tens of thousands of dollars worth at a time.
Each time this trader bought or sold, the order moved the market. SNDK climbed rapidly from $1531.10 to a peak of $1571.50, before easing back down to settle near $1560.00 as the burst of orders finally slowed.
In trading, massive individual market participants are called whales. When their orders get completed, it is recorded as a whale fill. Because their orders are so large relative to available listings, they directly push the price around.
Think of an order book like a pool of water. Normal trades are like small ripples, but when a whale moves back and forth quickly, it creates large waves that slosh the water level up and down before it can settle back to calm.
A single large trade creates a brief spike. But 17 alternating trades within minutes show an active strategy, like an automated algorithm rebalancing risk or testing how thin the market is. It signals temporary volatility.
Watching a large trader does not reveal whether the asset is about to boom or crash. The trader may simply be hedging another position elsewhere or unwinding inventory, leaving the price to drift anywhere once they stop.
Don't think a flurry of big trades means you should jump in the same direction. Think of it as a sign of high turbulence where sudden price jumps are driven by one player rather than broad market agreement.