FX Tracker

US stocks held in an IB ISA. All data stays on this device, in this browser. No account, no server.

Version 3 — 10 Nov 2026

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Backup — Export / Import

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If £ paid is blank, the app estimates £ cost from the live rate, and says “estimate” clearly. Fill it in later from the statement for the exact breakeven.

Live rate — GBP / USD

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Rate is the mid-market spot rate. IB adds about 0.03% to it, and the fill time matters, so breakeven below is an estimate, not the exact IB rate.

GBP/USD now (£1 = $)
£ per $1 (Rs) — auto from GBP/USD

How the breakeven works

Breakeven sell price, $ = ((total cost in £ + target profit in £) ÷ Rs + sell commission in $) ÷ quantity to sell

Rs = £ per $1 at sell. Rb = total £ cost ÷ total $ cost at buy. If Rs < Rb, sterling was stronger at sell, so FX is a loss. If Rs > Rb, FX is a gain.

IB 0.03% rule: the app adjusts the sell rate only — Rs used = Rs spot × 0.9997. It does not adjust the buy side, because your £ paid comes from IB and already includes the 0.03% buy fee.

Example from your NVDA trade: total cost £5,221.20, $6,992, Rb 0.7467. At Rs 0.7437, breakeven is $175.54 for 40 shares. At Rs 0.7692, breakeven is $169.72.