IG vs OANDA: Forex and CFD Platform Comparison (2026)

What does the forex specialist actually do better?

Three things, and they are real: platform choice, the API, and a single-minded focus on currencies that dates back to 1996. If your trading world is FX charts and nothing else, this section is OANDA's best pitch.

The widest platform menu here

OANDA UK lets you trade through its own OANDA Trade web and mobile platform, MetaTrader 4, MetaTrader 5 or TradingView, which is more third-party connectivity than IG offers. Anyone arriving with an existing MT4 expert advisor or a TradingView workflow can plug straight in. IG's stack is different rather than thinner: its own fast web platform with a published median execution of 85 milliseconds, plus ProRealTime professional charting free for anyone placing four or more trades a month. My honest read is that OANDA wins on plug-in flexibility and IG wins on the ceiling of what the tools can do. The currency range itself is a wash for most people: OANDA lists around 65 to 70 pairs across majors, minors and exotics per its UK pages in August 2026, and IG covers similar territory, so the pair you trade will almost certainly exist at both.

The API that built a following

OANDA's trading API is the reason many self-taught algorithmic traders opened their first account there: it is well documented, long established and designed to let you automate strategies against live and practice accounts. IG publishes a web API of its own, so automation is not exclusive to OANDA, but OANDA's developer community and documentation give it the edge for anyone whose plan is code-first trading in currencies. It is a niche advantage, and within that niche it is genuine.

Risk controls a forex house gets right

OANDA also publishes its margin mechanics plainly: retail accounts follow the standard FCA leverage caps, margin from 3.33% on major pairs, and positions are closed out automatically if account funds fall below 50% of the margin required, per its UK site in August 2026. IG runs equivalent FCA-mandated protections, including negative balance protection for retail clients, so neither firm leaves you owing more than your balance. The point is not that OANDA is safer, it is that a currencies-only shop documents this territory with a specialist's clarity.

Where does the generalist pull away?

Everywhere beyond currencies, and by an order of magnitude rather than a margin. The gap between 1,700 instruments and 17,000+ markets changes what an account can be for.

Ten times the markets, and sharper index pricing

OANDA's UK range covers forex, indices, commodities, metals, bonds and a set of US, UK and EU share CFDs, around 1,700 instruments in total per its site in August 2026. IG's 17,000+ markets swallow that whole and add thousands of global shares, more indices and niche markets OANDA does not touch. On cost, the FX door price is a dead heat at 0.6 pips on EUR/USD, but OANDA publishes no typical spread figures, so live quotes are worth watching, and on indices IG's published minimums are aggressive: 1 point on the FTSE 100, 0.4 on the US 500, 1.2 on the Germany 40 and 2.4 on Wall Street. Overnight costs are equally visible at IG, which prices funding from a single formula, an admin fee of 3.4% on spread bets or 3% on CFDs plus or minus the SONIA benchmark, around 3.73% in August 2026; OANDA applies financing per instrument, so position traders should compare their specific market rather than assume parity.

Spread betting heritage and the products around it

Both firms offer UK spread betting, which surprised me when I verified it: OANDA runs a tax-free spread betting sub-account usable through its platform, TradingView and MT4. The difference is centre of gravity. At OANDA, spread betting is a bolt-on to a forex CFD business; at IG it is the founding product, running since 1974 through IG Index (FCA reference 114059) across the full 17,000+ market range, with OTC daily, weekly and monthly options, share dealing and spot crypto on 150+ coins sitting alongside it in the same login. IG became a FTSE 100 company in March 2026, and the breadth of that product set is a large part of why.

How do they compare side by side?

Specialist and generalist, one row at a time, using each firm's published UK figures from August 2026.

Regulation, for completeness, is a tie worth having: IG Markets Ltd holds FCA reference 195355, OANDA Europe Ltd holds 542574, and eligible clients of both are covered by the FSCS up to 85,000 pounds. Corporate pedigree is a tie of a different flavour, a listed FTSE 100 firm founded in 1974 against a privately held forex house founded in 1996 that helped build online currency trading. I would open an account with either on trust grounds; the decision lives entirely in the rows above.

Which one should a UK trader pick?

Pick by trajectory, not by today. If you are a currencies-only trader who wants MT4 or MT5, or you intend to automate strategies through a mature API, OANDA is a perfectly respectable specialist home and its 0.6 pip EUR/USD floor matches the market leader. The specialist choice only goes wrong when the specialism stops fitting: the day you want to trade an individual share OANDA does not list, hedge with an option, or move a strategy into the spread betting wrapper at scale, you are opening a second account anyway. If there is any chance your trading grows beyond forex, and in my experience it almost always does, IG's 17,000+ markets, index pricing, options and heritage spread betting make it the account you choose once rather than twice. That is where my money is, literally: my diary of a first month day trading on IG is coming later this month on the blog.

The long version of the case for IG is in everything I found testing IG. For closer contests, read my IG vs CMC Markets verdict or see how IG got on against Capital.com.

FAQs

References

1. IG: forex spreads and markets
2. OANDA: UK products and platforms
3. OANDA: pricing and spreads
4. The Investors Centre: everything I found testing IG