Price history is the record of what a game has cost over time — its normal price, its lowest-ever price, and how often it goes on sale. It matters because it turns a marketing claim into a fact: a "70% off" banner is only a good deal if the game doesn't hit that price every few weeks.
Reading price history is about finding two numbers: the floor (the lowest price the game has ever reached) and the rhythm (how often it approaches that floor). Big titles typically settle into a predictable cycle — deep discounts during major seasonal sales, smaller cuts in between — and the floor tends to drop further as a game ages.
Armed with those two numbers, buying decisions get easy. If today's price is at or near the historical floor, buy with confidence. If the discount is shallower than the last three sales, wait — the better price will almost certainly return.
XBX SPY tracks pricing across 40+ regions, which adds a second dimension to this: the effective floor is the lowest historical price in the cheapest region, not just your local store. Combine price history with region comparison and set a price alert, and the deal comes to you.