Clear Tape

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Free trading calculators, trading-system rules, a glossary and lesson search. No market data.

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Status: Healthy
Last Tested: 2026-10-14 15:43
Transport: Streamable HTTP · MCP 2025-11-25
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Available Tools

11 tools

calculate_atr_stopATR stop-loss calculator

Read-onlyIdempotent

Inspect

A volatility (ATR) stop: entry minus (long) or plus (short) a multiple of the average true range. Give atr, or at least five recent daily ranges (high minus low). Computed with the same function as Clear Tape's free atr stop-loss calculator page (linked in the result), not estimated. Returns the inputs, each result with its unit, the formula and the page link. Educational, not investment advice.

ParametersJSON Schema

Name	Required	Description	Default
`atr`	No	Average true range in USD (e.g. the 14-day ATR). Give this or ranges.
`lang`	No	Language of the returned text: "en" (default) or "zh" (Simplified Chinese).	en
`side`	No	Trade direction: "long" (default) or "short".	long
`entry`	Yes	Entry price per share in USD.
`ranges`	No	Alternative to atr: 5 to 500 recent daily ranges (high minus low) in USD; their average stands in for the ATR.
`multiple`	Yes	ATR multiple for the stop distance, commonly 1.5 to 3.

calculate_drawdown_recoveryDrawdown recovery calculator

Read-onlyIdempotent

Inspect

The gain needed to recover from a drawdown and, optionally, how many losing trades in a row at a fixed risk per trade cause it. Computed with the same function as Clear Tape's free drawdown recovery calculator page (linked in the result), not estimated. Returns the inputs, each result with its unit, the formula and the page link. Educational, not investment advice.

ParametersJSON Schema

Name	Required	Description	Default
`lang`	No	Language of the returned text: "en" (default) or "zh" (Simplified Chinese).	en
`loss`	Yes	Drawdown in percent of the account (20 = 20%). Above 0, below 100.
`riskPct`	No	Optional: risk per trade in percent of the account. Above 0, below 100.

calculate_expectancyTrading expectancy calculator

Read-onlyIdempotent

Inspect

Expectancy per trade, per 100 trades, payoff ratio, break-even win rate and profit factor from a win rate and average win and loss. Computed with the same function as Clear Tape's free trading expectancy calculator page (linked in the result), not estimated. Returns the inputs, each result with its unit, the formula and the page link. Educational, not investment advice.

ParametersJSON Schema

Name	Required	Description	Default
`lang`	No	Language of the returned text: "en" (default) or "zh" (Simplified Chinese).	en
`avgWin`	Yes	Average winning trade as a positive amount, in USD or in R.
`avgLoss`	Yes	Average losing trade as a positive amount, in the same unit as avgWin.
`winRate`	Yes	Win rate in percent (40 = 40%). Above 0, at most 100.

calculate_kelly_criterionKelly criterion calculator

Read-onlyIdempotent

Inspect

Full and fractional Kelly risk per trade from a win rate and payoff ratio, with the edge per 1R and the break-even win rate. Computed with the same function as Clear Tape's free kelly criterion calculator page (linked in the result), not estimated. Returns the inputs, each result with its unit, the formula and the page link. Educational, not investment advice.

ParametersJSON Schema

Name	Required	Description	Default
`lang`	No	Language of the returned text: "en" (default) or "zh" (Simplified Chinese).	en
`payoff`	Yes	Payoff ratio: average win divided by average loss (2 = winners twice the size of losers).
`winRate`	Yes	Win rate in percent. Above 0, below 100.
`fraction`	Yes	Share of full Kelly to use, in percent: 25 = quarter Kelly, 50 = half, 100 = full. Above 0, at most 100.

calculate_losing_streakLosing streak calculator

Read-onlyIdempotent

Inspect

The exact probability of at least one losing streak of a given length over a number of independent trades, the expected longest streak and the streak 95% of sequences stay within. Computed with the same function as Clear Tape's free losing streak calculator page (linked in the result), not estimated. Returns the inputs, each result with its unit, the formula and the page link. Educational, not investment advice.

ParametersJSON Schema

Name	Required	Description	Default
`lang`	No	Language of the returned text: "en" (default) or "zh" (Simplified Chinese).	en
`streak`	Yes	Losing streak length to test, a whole number no larger than trades.
`trades`	Yes	Number of trades, a whole number from 1 to 2000.
`winRate`	Yes	Win rate in percent. Above 0, at most 100.

calculate_position_sizePosition size calculator

Read-onlyIdempotent

Inspect

Position size from the stop: how many shares to buy (or short) so that a stop-out loses a set percentage of the account. Computed with the same function as Clear Tape's free position size calculator page (linked in the result), not estimated. Returns the inputs, each result with its unit, the formula and the page link. Educational, not investment advice.

ParametersJSON Schema

Name	Required	Description	Default
`lang`	No	Language of the returned text: "en" (default) or "zh" (Simplified Chinese).	en
`stop`	Yes	Stop price per share in USD. Below the entry for a long, above it for a short; not equal to the entry.
`entry`	Yes	Entry price per share in USD.
`account`	Yes	Account size in USD.
`riskPct`	Yes	Risk per trade, percent of the account (1 = 1%). Above 0, at most 100.

calculate_risk_rewardRisk/reward and R-multiple calculator

Read-onlyIdempotent

Inspect

Risk/reward ratio of a planned trade, the win rate it needs to break even, and (optionally) an exit expressed as an R multiple. Computed with the same function as Clear Tape's free risk/reward and r-multiple calculator page (linked in the result), not estimated. Returns the inputs, each result with its unit, the formula and the page link. Educational, not investment advice.

ParametersJSON Schema

Name	Required	Description	Default
`exit`	No	Optional: an actual or planned exit price in USD, returned as an R multiple.
`lang`	No	Language of the returned text: "en" (default) or "zh" (Simplified Chinese).	en
`stop`	Yes	Stop price per share in USD; not equal to the entry.
`entry`	Yes	Entry price per share in USD.
`target`	Yes	Target price per share in USD, on the other side of the entry from the stop.

calculate_trading_costTrading cost calculator

Read-onlyIdempotent

Inspect

The cost of one round trip (commissions, bid-ask spread, slippage) in USD, in R, as a share of the target move and of the position, and over a year of trades. Computed with the same function as Clear Tape's free trading cost calculator page (linked in the result), not estimated. Returns the inputs, each result with its unit, the formula and the page link. Educational, not investment advice.

ParametersJSON Schema

Name	Required	Description	Default
`lang`	No	Language of the returned text: "en" (default) or "zh" (Simplified Chinese).	en
`stop`	Yes	Stop price per share in USD; not equal to the entry.
`entry`	Yes	Entry price per share in USD.
`shares`	Yes	Number of shares.
`spread`	Yes	Bid-ask spread per share in USD (paid once per round trip, half on each side).
`target`	No	Optional: target price per share in USD, on the other side of the entry from the stop.
`trades`	No	Optional: round trips per year, for the annual cost.
`slippage`	Yes	Slippage per share per side in USD.
`commission`	Yes	Commission per order (each side) in USD; 0 if none.

get_trading_system_rulesTrading system rules

Read-onlyIdempotent

Inspect

Without id: lists Clear Tape's five preset trading systems (trend and breakout) with their style, holding period and one-line entry, stop and exit. With id: one system's exact written rules (entry, stop, exit, target, parameters, the data it needs, terms, where it differs from the published method), its strengths, weaknesses, who it suits and its sources, worded exactly as on its strategy page. Rules only: no signals, no prices, no performance figures. Educational, not investment advice.

ParametersJSON Schema

Name	Required	Description	Default
`id`	No	The system to describe; leave out to list them all.
`lang`	No	Language of the returned text: "en" (default) or "zh" (Simplified Chinese).	en

lookup_glossary_termTrading glossary

Read-onlyIdempotent

Inspect

Looks up a trading term in Clear Tape's bilingual (English and Simplified Chinese) glossary of about 70 terms, such as "R multiple", "ATR", "drawdown" or "止损". Matches names, abbreviations and pinyin, and tolerates misspellings. Returns the definition, the term in the other language, close matches and links.

ParametersJSON Schema

Name	Required	Description	Default
`lang`	No	Language of the returned text: "en" (default) or "zh" (Simplified Chinese).	en
`term`	Yes	The term to look up, in English or Chinese.

search_learningSearch trading lessons

Read-onlyIdempotent

Inspect

Searches Clear Tape's free trading education by keyword: the Learn articles, the Academy lessons, the trading-strategy pages and the calculators, in English or Chinese. Returns titles, one-line summaries and links to read the full page. No market data.

ParametersJSON Schema

Name	Required	Description	Default
`lang`	No	Language of the returned text: "en" (default) or "zh" (Simplified Chinese).	en
`limit`	No	Most results to return (1 to 20, default 8).
`query`	Yes	Keywords, e.g. "position sizing" or "均值回归".

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

11 tool updatesOct 14, 2026
- First observedcalculate_atr_stop
- First observedcalculate_drawdown_recovery
- First observedcalculate_expectancy
- First observedcalculate_kelly_criterion
- First observedcalculate_losing_streak
- First observedcalculate_position_size
- First observedcalculate_risk_reward
- First observedcalculate_trading_cost
- First observedget_trading_system_rules
- First observedlookup_glossary_term
- First observedsearch_learning

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