# Trading Journal Observations — Trailing Mean Series + Equal-Width Histogram

> Trading Journal Observations — Trailing Mean Series + Equal-Width Histogram is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-26).

Computes a trailing mean time series and an equal-width histogram for entry_price or exit_price fields from up to 200 trading journal records.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-finance-09-148?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-26
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/trading-journal-observations-trailing-mean-series-equal-width-histogram-50de70d1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nSHhIA2KARCL-4sQzNIod

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability trading-journal-observations-trailing-mean-series-equal-width-histogram-50de70d1 -d '<json body>'
```

Example prompt: I have 50 trading journal entries with entry and exit prices — can you compute a trailing mean series using a window of 5 and an equal-width histogram with 10 bins for the entry_price field? Here are my rows: [{"row_id":"t1","instrument_group":"equities","date":"2024-01-02","entry_price":150.5,"exit_price":155.0}, ...]

## When to prefer this

Choose this endpoint when you have up to 200 trading journal records with entry/exit prices and need both a rolling mean time series and a binned frequency distribution in a single low-cost call ($0.01 USDC). Ideal for offline or batch statistical review of trade price data without needing live market feeds, predictions, or external lookups. Prefer it over generic analytics tools when you want both a trend (trailing mean) and a distribution (histogram) report bundled together for trading-specific fields.

## Known failure modes

- Fewer than 1 row supplied — rejected by minItems validation
- Window size larger than number of rows — trailing mean may produce sparse or no results
- Null entry_price or exit_price values may reduce effective row count for computation
- More than 200 rows submitted — rejected by maxItems constraint
- Invalid date format not matching YYYY-MM-DD pattern
- bins value outside 1–30 range — schema validation error
- Missing required fields (row_id, instrument_group, date) — validation failure

## How this service works

Trading journal observations — Trailing mean series + Equal-width histogram: Trailing mean series + Equal-width histogram for supplied trading journal observations records (entry_price, exit_price). Up to 200 rows; 2 independent reports using shared local analytical engines. No live lookup, prediction, professional assessment or external action. 0.01 USDC includes 2 supplied-data reports for up to 200 rows.

## Output

Returns two analytical reports: (1) a trailing mean time series showing rolling averages of the selected price field (entry_price or exit_price) computed over the specified window, and (2) an equal-width histogram showing the frequency distribution of that field across the specified number of bins — all derived locally from the supplied rows, with no external data lookups.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "bins": {
   "type": "integer",
   "default": 5,
   "maximum": 30,
   "minimum": 1
  },
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "instrument_group",
     "date",
     "entry_price",
     "exit_price"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "exit_price": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "entry_price": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "instrument_group": {
      "type": "string",
      "default": "",
      "maxLength": 80
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "exit_price": 1,
     "entry_price": 10,
     "instrument_group": "group-a"
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "exit_price": 2,
     "entry_price": 20,
     "instrument_group": "group-b"
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "exit_price": 3,
     "entry_price": 15,
     "instrument_group": "group-a"
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "exit_price": 4,
     "entry_price": 30,
     "instrument_group": "group-b"
    }
   ],
   "maxItems": 200,
   "minItems": 1
  },
  "field": {
   "enum": [
    "entry_price",
    "exit_price"
   ],
   "type": "string",
   "default": "entry_price"
  },
  "window": {
   "type": "integer",
   "default": 2,
   "maximum": 200,
   "minimum": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/trading-journal-observations-trailing-mean-series-equal-width-histogram-50de70d1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)