# data_fetch_candles

A read tool on the MetaTrader5 MCP Server MCP server.

Agent View of the PolicyLayer registry record for `data_fetch_candles`. HTML page: https://policylayer.com/tools/emerzon-mt-data-mcp/data-fetch-candles

## Facts

- Tool: `data_fetch_candles`
- Server: MetaTrader5 MCP Server (`emerzon/mt-data-mcp`) — https://policylayer.com/tools/emerzon-mt-data-mcp.md
- Homepage: https://github.com/emerzon/mt-data-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "data_fetch_candles",
    "arguments": {}
  }
}
```

## Why data_fetch_candles is rated Low

This tool retrieves historical candlestick pricing data without modifying market state or executing trades. It is a Read operation. Severity is medium rather than low because financial market data access could enable market manipulation or unfair trading if combined with execution tools, but the tool itself has no direct harmful effects.

From the tool's own definition: "Tool name 'data_fetch_candles' indicates retrieval of OHLCV candle data. Server description confirms it provides 'historical OHLCV data' and 'real-time quotes' for forex and trading instruments."

## Use case

AI agents call data_fetch_candles to retrieve information from MetaTrader5 MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches MetaTrader5 MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "data_fetch_candles": {}
  }
}
```

## Other tools on MetaTrader5 MCP Server (81)

- `forecast_models_cleanup` — Destructive — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-models-cleanup.md
- `forecast_models_delete` — Destructive — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-models-delete.md
- `forecast_task_cancel` — Destructive — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-task-cancel.md
- `forecast_task_cancel_all` — Destructive — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-task-cancel-all.md
- `forecast_backtest_run` — Execute — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-backtest-run.md
- `forecast_generate` — Execute — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-generate.md
- `forecast_task_wait` — Execute — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-task-wait.md
- `forecast_train` — Execute — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-train.md
- `forecast_tune_genetic` — Execute — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-tune-genetic.md
- `forecast_tune_optuna` — Execute — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-tune-optuna.md
- `options_heston_calibrate` — Execute — https://policylayer.com/tools/emerzon-mt-data-mcp/options-heston-calibrate.md
- `strategy_backtest` — Execute — https://policylayer.com/tools/emerzon-mt-data-mcp/strategy-backtest.md
- `strategy_validate` — Execute — https://policylayer.com/tools/emerzon-mt-data-mcp/strategy-validate.md
- `wait_event` — Execute — https://policylayer.com/tools/emerzon-mt-data-mcp/wait-event.md
- `forecast_barrier_optimize` — Financial — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-barrier-optimize.md
- `options_barrier_price` — Financial — https://policylayer.com/tools/emerzon-mt-data-mcp/options-barrier-price.md
- `trade_close` — Financial — https://policylayer.com/tools/emerzon-mt-data-mcp/trade-close.md
- `trade_modify` — Financial — https://policylayer.com/tools/emerzon-mt-data-mcp/trade-modify.md
- `trade_place` — Financial — https://policylayer.com/tools/emerzon-mt-data-mcp/trade-place.md
- `trade_risk_analyze` — Financial — https://policylayer.com/tools/emerzon-mt-data-mcp/trade-risk-analyze.md
- `trade_var_cvar_calculate` — Financial — https://policylayer.com/tools/emerzon-mt-data-mcp/trade-var-cvar-calculate.md
- `causal_discover_signals` — Other — https://policylayer.com/tools/emerzon-mt-data-mcp/causal-discover-signals.md
- `forecast_barrier_prob` — Other — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-barrier-prob.md
- `forecast_optimize_hints` — Other — https://policylayer.com/tools/emerzon-mt-data-mcp/forecast-optimize-hints.md
- `labels_triple_barrier` — Other — https://policylayer.com/tools/emerzon-mt-data-mcp/labels-triple-barrier.md
- `report_generate` — Other — https://policylayer.com/tools/emerzon-mt-data-mcp/report-generate.md
- `temporal_analyze` — Other — https://policylayer.com/tools/emerzon-mt-data-mcp/temporal-analyze.md
- `trade_session_context` — Other — https://policylayer.com/tools/emerzon-mt-data-mcp/trade-session-context.md
- `asset_performance` — Read — https://policylayer.com/tools/emerzon-mt-data-mcp/asset-performance.md
- `cointegration_test` — Read — https://policylayer.com/tools/emerzon-mt-data-mcp/cointegration-test.md
- …and 51 more: https://policylayer.com/tools/emerzon-mt-data-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=emerzon-mt-data-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/emerzon-mt-data-mcp