How to read Amazon price history: practical guide

Ever seen a strikethrough price and thought 'what a bargain!', only to find out the product cost the same a few weeks ago? It happens more often than you think. The strikethrough price is not a guarantee of a discount – it's just a number someone wrote. To know if a deal is real, you need objective data: the 90-day Amazon price history. Learning to read it turns you from an emotional shopper into a rational hunter, and helps you spot the real bargains – like the verified deals you find on Glitchoo.

What is the 90-day Amazon price history?

The 90-day price history tracks the selling price of a product on Amazon over three months. This is not the RRP, but the actual price at which the product has been sold. The chart shows lows, highs, the median, and spikes, letting you answer the key question: 'is this price an anomaly or the norm?'

What do the lines on the chart mean?

A typical price history chart shows:

• The current price line: fluctuates day by day (or hour by hour).
• The minimum and maximum prices: the two extremes of the period.
• The median line: the central value, more reliable than the average because it isn't skewed by extreme spikes.
• Any tags (strikethrough price): the comparison price declared by the seller.

Glitchoo uses this data to calculate the Trust Score, a rating that indicates how real the deal is based on history, not the strikethrough price.

How to spot a real discount? The 90-day method

A discount is real when the current price is lower than the 90-day minimum or at least significantly below the median. If the strikethrough price is sky high but the history shows the product has always been at that 'discounted' price, then the deal is a fake markdown.

Practical example: a fake markdown

Imagine a kitchen appliance with a strikethrough price of £299 and a current price of £199. That looks like -33%. But checking the 90-day history, you see the price has always been between £189 and £210. The strikethrough price is inflated, and the bargain doesn't exist. Glitchoo flags these situations with a low Trust Score and excludes them from the featured deals.

The most common patterns in price history

Here are three typical patterns you need to know:

| Pattern | Description | What it means for you | |---------|-------------|----------------------| | Sawtooth (zigzag) | Price frequently goes up and down by a few pounds | It's a fluctuating price, often due to third-party sellers or coupons. Not a rare opportunity, but wait for the lowest point of the sawtooth. | | Step | Price drops suddenly and stays low for days | Could be a price glitch or a structural reduction. If the step is sharp and the price is well below the median, it's a good sign. | | Fake markdown | High strikethrough price, but history flat at a much lower value | Fictitious discount. The product was never sold at the strikethrough price. |

Glitchoo catches exactly these price errors (glitches) or real steps, and alerts you in real time. For example, today deals with real discounts include a Bluetooth earbud at -82% which, verified against history, shows a price never seen before.

The Trust Score: your ally to avoid mistakes

Glitchoo's Trust Score is a rating from 0 to 100 that summarises the reliability of a deal. It is based on:

• 90-day history: how much the current price is below the historical minimum.
• Relationship with the median: if the price is below the median, the score goes up.
• Presence of coupons: genuine coupons increase the score, but are never added to the discount to inflate it.
• Seller and fulfilment: 'Dispatched from Amazon' carries more weight.

A high Trust Score (e.g. 85+) means you're buying at a genuinely good price, not a 'normal' price disguised as a deal. You can check how it works for details.

How to use price history in your everyday shopping

You don't need to be an analyst: just follow these steps.

1. Open the product page on Amazon.
2. Check the price history (on Glitchoo or other tools). Identify the median and the minimum.
3. Compare the current price against the 90-day minimum. If it's equal or lower, that's a good sign.
4. Verify the strikethrough price: if it's much higher than the historical maximum, it's fake.
5. Use Glitchoo's Trust Score for a quick summary.

Watch out for seasonality

Some products have seasonal spikes: fans in summer, toys at Christmas. The 90-day history can be misleading if the period only covers the high season. In these cases, extend the comparison to 12 months if available. But over 90 days, a sharp drop from a seasonal peak is still a good time to buy.

Real examples today: deals that pass the history test

Today on Glitchoo, some deals clearly show how history makes the difference:

• Bluetooth 5.4 headphones on Amazon UK: -82%. The Trust Score is high because the 90-day history shows the price was stable around £35, now £15. It's a real step.
• OKYUK Aire Acondicionado on Amazon ES: -90%. The current price is below the 3-month historical minimum. Could it be a price error? Possibly, but Amazon may cancel the order. We flag it, you decide.

Both deals are in the cards below: discover them now and check the history yourself.

Frequently Asked Questions

Is the historical minimum always the best price?

No. The historical minimum might have been a cancelled price error or a flash sale. Better to compare with the median: if the current price is below the median, it's already a good deal.

Can the Trust Score be wrong?

The Trust Score is an indicator based on objective data (90-day history, strikethrough price, coupons). It doesn't guarantee the future, but if it's high, the probability of a real discount is very high. Always check the Amazon page before buying.

How do I see a product's price history?

On Glitchoo, every deal has a built-in price history chart. You can also use browser extensions, but we give you the analysis ready-made.

Do coupons distort the history?

No. Glitchoo never aggregates coupons into the discount. The history shows the price without the coupon, and the coupon is an extra bonus. This way, you won't confuse a fake -50% (price + coupon) with a real -50% on the base price.

How often is the history updated?

Glitchoo updates the history every few hours. Amazon prices change constantly: always check the product page before buying.

Conclusion

Reading the 90-day Amazon price history is the superpower that turns impulse buying into a conscious choice. Don't fall for fake markdowns: use the Trust Score and the patterns I've shown you. Now you have the tools to act.

Don't wait: real deals last hours, not days. Browse verified deals and lock in your bargain before the price goes back up. And if you want to understand the method even better, visit the how it works page.