# Trading Journal Observations — Grouped Numeric Summary + Secondary-Measure Weighted Mean

> Trading Journal Observations — Grouped Numeric Summary + Secondary-Measure Weighted Mean 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 grouped numeric summaries and secondary-measure weighted means for trading journal observations (entry_price, exit_price) across up to 200 rows, returning two analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-finance-09-096?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-grouped-numeric-summary-secondary-2ad6a2cc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fNaKhZcKfCjpnFSDI6Fr_

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-grouped-numeric-summary-secondary-2ad6a2cc -d '<json body>'
```

Example prompt: Can you run a grouped numeric summary and weighted mean analysis on my trading journal data? I have 4 trades: row-1 on 2026-10-01 in group-a with entry 10 and exit 1, row-2 on 2026-10-02 in group-b with entry 20 and exit 2, row-3 on 2026-10-03 in group-a with entry 15 and exit 3, row-4 on 2026-10-04 in group-b with entry 30 and exit 4 — use entry_price as the primary field.

## When to prefer this

Choose this endpoint when you need fast, local statistical aggregation of trading journal data grouped by instrument category, specifically grouped numeric summaries combined with weighted mean calculations, without requiring any live market data, external APIs, or predictions. Ideal for post-session trade analysis workflows where you supply structured entry/exit price observations and need two reports in a single $0.01 call.

## Known failure modes

- Empty rows array — returns validation error (minItems: 1)
- Rows exceed 200 items — rejected due to maxItems constraint
- Invalid date format not matching YYYY-MM-DD pattern — schema validation error
- entry_price or exit_price outside allowed range (-1e12 to 1e12) — validation failure
- Missing required fields (row_id, instrument_group, date, entry_price, exit_price) — schema error
- Invalid field enum value (not 'entry_price' or 'exit_price') — rejected
- Payment failure — x402 payment of 0.01 USDC not processed correctly

## How this service works

Trading journal observations — Grouped numeric summary + Secondary-measure weighted mean: Grouped numeric summary + Secondary-measure weighted mean 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 grouped numeric summary (e.g. count, min, max, mean, std) of the selected price field broken down by instrument_group, and (2) a secondary-measure weighted mean where the primary field values are weighted by the secondary price field, both computed locally without any external lookups.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "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"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/trading-journal-observations-grouped-numeric-summary-secondary-2ad6a2cc/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)