# How to Get BUFF Float-Range Price History

> `POST /v1/market/buff/history` returns BUFF price history for specific float
> ranges from May 19, 2026. Each range has separate ask, average-ask, bid,
> listing-volume, and buy-order-volume data.

An exterior-wide floor can misprice an exact float. A low-float Factory New or
low-end Field-Tested item may trade in a BUFF range whose ask is materially
different from the base bucket for the same `market_hash_name`.

## How the BUFF float bucket model works

Every item is split into `base`, `float`, `fade`, and `float_fade` buckets when
those range types apply:

- The `base` bucket aggregates the whole item or variant.
- A `float` bucket carries numeric `float.min` and `float.max` bounds.
- A `float_fade` bucket requires both the float and Fade percentage to match.
- Supported Doppler, Gamma Doppler, and Case Hardened variants have their own
  bucket lists under `variants`.

Bounds include `min` and exclude `max`. An exact float of `0.18` does not belong
to `float:0.15:0.18`; it belongs to the range beginning at `0.18`, if that
range exists.

`bucket_id` is stable across current and historical responses. A variant
identifier can combine both identities, such as
`variant:p2|float:0.00:0.01`. This makes the market definition explicit:
Phase 2 and the `0.00:0.01` float range must both match.

## Query and compare float-range history

Request the exact base `market_hash_name`. The response includes every range
available for that item, so select by the stable `bucket_id` discovered through
`GET /v1/market/buff/latest`.

Each historical point carries OHLC for `ask`, `avg_ask`, and `bid`.
`ask_volume` and `bid_volume` are the last observed values in the interval.
The endpoint supports `30m`, `1h`, and `1d`, and the underlying BUFF range data
refreshes every 10 minutes.

To calculate a float premium, compare the range's `close_ask` with the base
bucket's `close_ask` at the same UTC `bucket`. For a variant float premium,
compare against that variant's base bucket. Comparing with the parent item
would mix the variant premium into the float premium.

## Applicable endpoints

| Endpoint | Returns | Plans |
| --- | --- | --- |
| `POST /v1/market/buff/history` | Float and combined-range OHLC from May 19, 2026 | Scale, Enterprise |
| `GET /v1/market/buff/latest` | Current range catalog, prices, and stable bucket IDs | All plans |

## Analysis boundaries

- BUFF ranges vary by item, exterior, float cap, and variant. Discover the
  returned catalog instead of deriving buckets from the wear label.
- `bucket` marks the UTC interval boundary. `open_time` and `close_time` show
  the real observation window and should be retained when sparse coverage
  would affect the comparison.
- The range ask is a listing floor rather than a completed-sale price. A
  persistent premium shows that the active market stayed higher; it does not
  prove buyers completed sales at that premium.
- History before May 19, 2026 is unavailable for these BUFF range buckets.
  The broader [BUFF163 archive guide](/resources/how-to-get-buff163-price-history)
  covers base-market history from 2023, without float-range detail.