A price move is hardly ever one thing. Telling the six apart is most of what reading a market means.
A share price is just what somebody paid. Behind any move sit six causes. Mix them up and you'll learn the wrong lesson from a trade that worked.
These two look identical on a chart and mean opposite things.
Say people now expect a company to earn 10% less, and the price drops 10%. Nothing changed about how the market values this kind of business. There's just less business to value.
Now say the profits are untouched and the price still drops 10%. The market has decided a company like this is worth less for every dollar it earns. Usually that's about interest rates, and not about the company at all.
That second one is what happens when a central bank raises rates. A dollar of profit arriving years from now is worth less today. So the price people pay per dollar of profit shrinks across the whole market. Companies whose profits arrive furthest away fall hardest. People shorten all that to "growth stocks are rate-sensitive".
Margin Call keeps the two halves apart on purpose. Fair value is earnings per share times a target multiple. That multiple moves with interest rates, with central bank bond-buying, with the sector, and with how long the growth should last. You can watch each half on its own.
A big buyer eats through the sell orders sitting just above the price. Nobody learned anything about the business. The price went up because the cheap shares got bought. So a big move on heavy volume with no news is telling you about supply, and it usually fades.
It's also why size costs money. An order big enough to chew through several price levels ends up paying worse than the price on screen. Traders call that slippage. Nobody charged you a fee. The maths just works out that way. Margin Call fills your orders against a real order book, so the depth you can see is the depth you trade through.
The one worth knowing is the short squeeze, where the buying is forced. Short sellers closing a bet have to buy. Their buying lifts the price. The higher price forces more of them to close. The buying feeds itself, so squeezes rocket up and then give most of it back.
Sentiment is the crowd leaning one way with no new facts. Chasing whatever's going up. Feeling brave, or feeling nervous. It really does move prices, and it fades again.
Noise is what's left over. Markets are made of people, and people buy and sell for reasons that never add up to anything.
So most daily moves mean nothing at all. A share down 1.2% on no news isn't telling you anything. Treat that as a signal and your trading plan turns into superstition.
Margin Call records this breakdown for every single move. It shows up as "WHY IT MOVED", with all six causes and how much each one added, one click from any holding.
No other screen is as useful, because it answers what a chart can't. It tells you whether you were right for the reason you thought.