# Classic and Floor-Trader Pivot Points

`D08-F01-A05` · Geometric Chart Patterns → Pivots and Levels · archetype `record-transform` · difficulty 2/5 · verification **verified**

Full page: https://docs.thefintechbuilder.com/geometric-chart-patterns/pivots-and-levels/classic-and-floor-trader-pivot-points/
Agent skill: `npx skills add IslamBaraka90/Fintech-Algorithms-Library` — https://docs.thefintechbuilder.com/guides/agent-skill/

## Install and import

```bash
npm install fintech-algorithms
```

```ts
import { classicAndFloorTraderPivotPoints } from "fintech-algorithms/geometric-chart-patterns/pivots-and-levels/classic-and-floor-trader-pivot-points";
```

## Signature

```ts
classicAndFloorTraderPivotPoints(input)
```

Projects the classic floor-trader pivot and two resistance/support pairs for each bar from the previous bar's high, low, and close. The pivot is `(H + L + C) / 3`, `r1`/`s1` reflect it across the prior low and high, and `r2`/`s2` add and subtract the prior bar's range.

## Parameters

| Name | Type | Required | Notes |
| --- | --- | --- | --- |
| `input` | `TopicInput` | yes | `bars` is the required OHLCV history, strictly ordered by `timestamp` and on a single adjustment basis. This variant reads no keys from `parameters`, but the family still validates `period` (default `20`) as an integer of at least 2 whenever it is supplied. |

## Returns

`TopicResult`

`series` and `latest` carry `pivot`, `r1`, `s1`, `r2` and `s2`. The warm-up is one bar: index 0 has no prior bar to derive levels from, so `ready_at` is 1 for any input of two or more bars.

## Warm-up

The first `1 bar` positions are `null`. Every level at index i is computed from bar i-1 only, so index 0 is null across all five series and `ready_at` settles at 1.

## Errors

- When a bar's `high` is below its own `open`, `close`, or `low` (or `low` is above them) — throws Error
- When `period` is supplied as a non-integer or as a value below 2 — throws Error

## Complexity

Time `O(n)`, space `O(n)`.

## Worked example

Captured by running this function on the input its own test provides. Real output of real code — but not asserted against a published figure.

### Input

`input`:

```json
{
  "bars": [
    {
      "timestamp": "2024-01-02",
      "basis": "synthetic-unadjusted",
      "open": 100,
      "high": 101.45,
      "low": 98.695,
      "close": 100,
      "volume": 750000,
      "benchmark": 200
    },
    {
      "timestamp": "2024-01-03",
      "basis": "synthetic-unadjusted",
      "open": 101.49111452,
      "high": 103.38381693,
      "low": 100.05480022,
      "close": 101.78791214,
      "volume": 795117,
      "benchmark": 200.56326135
    },
    {
      "timestamp": "2024-01-04",
      "basis": "synthetic-unadjusted",
      "open": 102.45519048,
      "high": 104.6701838,
      "low": 100.91147007,
      "close": 102.9549389,
      "volume": 840234,
      "benchmark": 201.11020913
    }
  ],
  "parameters": {}
}
```

### Call

```ts
classicAndFloorTraderPivotPoints(input)
```

### Returns

object with 9 fields: topic_id, title, state, ready, ready_at, series, latest, parameters, …

```json
{
  "topic_id": "D08-F01-A05",
  "title": "Classic and Floor-Trader Pivot Points",
  "state": "calculated",
  "ready": true,
  "ready_at": 1,
  "series": {
    "pivot": [
      null,
      100.04833333333333,
      101.74217643000001,
      102.84553092333333,
      103.11026585,
      102.75204238333333
    ],
    "r1": [
      null,
      101.40166666666667,
      103.42955264000003,
      104.77959177666666,
      105.14059180000001,
      104.70666929666666
    ],
    "s1": [
      null,
      98.64666666666666,
      100.10053593000004,
      101.02087804666665,
      101.20195674000001,
      100.87667321666666
    ],
    "r2": [
      null,
      102.80333333333334,
      105.07119314,
      106.60424465333334,
      107.04890091,
      106.58203846333333
    ],
    "s2": [
      null,
      97.29333333333332,
      98.41315972000002,
      99.08681719333332,
      99.17163079000001,
      98.92204630333333
    ]
  },
  "latest": {
    "pivot": 101.55414906333333,
    "r1": 103.07243937666665,
    "s1": 99.95121557666666,
    "r2": 104.67537286333332,
    "s2": 98.43292526333333
  },
  "parameters": {},
  "diagnostics": {
    "causal": true,
    "input_count": 96
  }
}
```

## Verification and provenance

Tier: **verified** (via E).

The worked example below is the figure published in this algorithm's article, replayed and asserted by the test suite on every build. The arithmetic cannot drift without the build failing.

Both tiers guarantee the signature. Full explanation: https://docs.thefintechbuilder.com/guides/verification/

Generated from the docs.json payload shipped inside fintech-algorithms@0.13.0.
The signature and parameter list are checked against the compiled implementation at build time,
so a description that contradicts the code fails the build rather than reaching this file.

## Links

- Article (how it works, step by step): https://thefintechbuilder.com/geometric-chart-patterns/pivots-and-levels/classic-and-floor-trader-pivot-points/
- Implementation source: https://github.com/IslamBaraka90/Fintech-Algorithms-Library/blob/main/src/geometric-chart-patterns/pivots-and-levels/classic-and-floor-trader-pivot-points/impl.ts
- Package on npm: https://www.npmjs.com/package/fintech-algorithms
- Domain index for agents: https://docs.thefintechbuilder.com/geometric-chart-patterns/llms.txt