Chart quiz: up or down? Call three synthetic charts
Each chart is generated fresh in your browser, with the last two fifths of it held back. Call the direction, then see what happened.
How each chart is made
Random walk · 120 points · 72 drawn, 48 held back
Every series is 120 points long and starts at 100. Each step multiplies the previous value by a drift — drawn once per chart, and never more than about a tenth of a percent per step — plus a random shock of up to 1.4 percent in either direction. That is the whole model. There is no trend that reverses, no support level, no volume and no news. The first 72 points are drawn on the canvas and the last 48 are held back, so you are calling the final two fifths of a series from the first three fifths of it.
Why the charts are not real
A real chart carries its own answer. Anyone who recognises the shape of March 2020, or reads the axis, or guesses the ticker, has stopped reading the chart and started remembering. A generated series has no history to remember, so the same drill still works the second time and the tenth. It also means nothing in the quiz is a real price, and no market data is being redistributed to you.
What the reveal shows
Once you have called it, the hidden stretch is drawn in — green if it finished above the last visible point, red if it finished below — with a dashed line marking where your information ran out. Read the shape and not only the colour: a series that climbed for thirty points and then gave back more than it gained still counts as lower, because the only comparison being made is the final point against the last one you could see.
Three charts to a round. The score counts calls, not money — there is no position size here, so being right by a tenth of a percent scores exactly the same as being right by twenty. Every chart is generated afresh when the page loads, which is also why there is nothing to look up afterwards.