io.github.SKalinin909/tradingcalc
8 crypto futures calculators: PnL, liquidation, break-even, target exit, risk sizing, funding cost.
- -Reduce response time (currently 1628ms, target <1000ms)
Calculate net PnL, ROE, fees and gross profit/loss for a futures trade. Use when user asks "what's my profit/loss on this trade?" Returns: grossPnl, fees, netPnl, netPnlUsdt, roe (%).
Calculate the liquidation price for an isolated-margin futures position. Use when user asks "where will I get liquidated?" or "how close is my liq price?". Returns: liquidationPrice, distancePct (how far from entry).
Calculate the break-even exit price that covers all trading fees. Use when user asks "what price do I need to just break even?" Returns: breakevenPrice, totalFees.
Calculate the correct position size given a maximum risk in USDT and a stop-loss price. Use when user asks "how many coins should I buy?" or "size my position so I risk exactly $X". Returns: positionSize (base), positionUsdt, marginRequired.
Calculate the total funding cost (or income) for holding a perpetual futures position. Use when user asks "how much funding will I pay holding X days?" or "is funding eating my profit?". Returns: totalFundingUsdt (negative = you pay, positive = you receive), perIntervalUsdt.
Calculate the weighted average entry price from multiple buy/sell fills (DCA). Use when user has filled at multiple prices and asks "what's my average entry?" Returns: averagePrice, totalSize, totalCost.
Calculate the exact exit price needed to hit a target PnL or ROE percentage. Use when user asks "at what price do I take profit to make $500?" or "where should I set TP for 20% ROE?". Returns: targetExitPrice.
Run a scenario analysis: compute PnL for multiple price-change percentages at once. Use when user asks "show me my P&L if BTC moves -10%, -5%, +5%, +10%". Returns: array of { deltaPct, exitPrice, netPnl, roe }.
Calculate the maximum safe leverage based on account size, max acceptable drawdown, and asset daily volatility. Use when user asks "what's the max leverage I should use on BTC?" or "how much leverage is safe given 3% daily volatility?". Returns: maxLeverage, marginAtRisk.
Calculate the short perpetual futures position size needed to hedge a spot holding. Use when user asks "how much should I short to hedge my BTC?" or "what margin do I need for a 100% hedge?". Returns: hedgeNotional, requiredMargin, estimatedFundingCost.
Calculate funding rate arbitrage profit: annualized yield, net profit, and breakeven days for a long/short basis trade across two exchanges. Use when user asks "is this funding arb worth it?" or "how many days to break even on transfer fees?". Returns: netProfitUsdt, annualizedYieldPct, breakevenDays.
Project capital growth from reinvesting perpetual futures funding income (compounding carry). Use when user asks "how much will I make compounding 0.01% funding for 90 days?" or "what's my APY on this carry position?". Returns: finalCapital, totalEarned, apy, growthTable.
Full pre-trade decision card: orchestrates position sizing, breakeven, liquidation, and funding cost in one call. Use when user describes a full trade setup and asks "should I take this trade?" or "run the numbers on this setup". Provide exchange+symbol to fetch live funding rate automatically. Returns: positionSize, breakeven, liquidationPrice, fundingCost, overnightBreakevenShift, verdict.
Full risk:reward analysis — the single best tool when user describes a trade with entry, stop, and target. Calculates R:R ratio, position size, liquidation price, breakeven, and P&L at both stop and target. Returns a verdict: strong (3:1+) / good (2:1+) / marginal / poor. Use when user asks "is this trade worth taking?" or "what's my risk reward on this setup?".
DCA entry planner: weighted average entry price, breakeven, and per-level contribution from multiple fill prices and sizes. Use when user bought at several prices and asks "what's my average entry?" or "where is my DCA breakeven?". Returns: averageEntry, breakeven, per-level summary.
Scale-out planner: P&L, ROI, and cumulative P&L for each partial exit level. Use when user wants to take profit at multiple targets — "close 30% at $90k, 30% at $95k, 40% at $100k — what's my total P&L?". Returns: per-level pnl, weightedAvgExitPrice, totalRoi.
Delta-neutral carry trade (funding arbitrage) analysis. Use when user asks "is this carry trade worth it?" — long on exchange A, short on exchange B, collect the funding rate spread. Returns: netYieldPct, grossProfit, netProfit, breakevenDays, verdict (profitable/marginal/loss).
Price move needed to cover funding cost + fees over a holding period. Use when user asks "how much does BTC need to move for me to profit after funding?" or "is funding killing my edge on this trade?". Returns: breakevenWithFunding, breakevenWithoutFunding, requiredMovePct.
Run the full regression suite — 22 canonical test vectors across all 12 calculators — and return a pass/fail report with counts and timestamp. Call this before using results in production workflows to confirm the computation layer is operating correctly.
| Timestamp | Status | Latency | Conformance |
|---|---|---|---|
| Jul 3, 2026 | success | 279.9ms | Pass |
| Jun 30, 2026 | success | 1628.6ms | Pass |
| Jun 27, 2026 | success | 336.9ms | Pass |
| Jun 25, 2026 | success | 216.8ms | Pass |
| Jun 24, 2026 | success | 1668.6ms | Pass |
| Jun 17, 2026 | success | 235.5ms | Pass |
| Jun 16, 2026 | success | 309.2ms | Pass |
| Jun 16, 2026 | success | 1550.7ms | Pass |
| Jun 15, 2026 | success | 301.1ms | Pass |
| Jun 12, 2026 | success | 256.4ms | Pass |