The testing depth was uneven, and you should know that before reading anything else. TerminalEdge was used every day from 11 September 2026 on a free account provided by TerminalEdge. Koyfin was tested on its 7-day all-features trial; its free-plan limits are taken from Koyfin’s own pricing and plan-comparison pages rather than from a free account.

Both platforms carried the same watchlist: AAPL, MSFT, NVDA, TSLA, AMZN, ASML, NATR, RFIL, VWCE, WOR and TSEM, with GOOGL added on TerminalEdge only. Closing prices were compared against Yahoo Finance’s official close. For VWCE, the reference is the previous close shown in Yahoo’s quote header, because Yahoo’s historical table had no row for 17 September.

TerminalEdge changed data provider during the test. By the founder’s account, prices came from Alpaca’s IEX feed until 13 September and from Twelve Data from 14 September; news still comes from Alpaca. Results below are dated so you can see which feed produced them.

After TerminalEdge reported fixes to its AI modules, its Movers list, its end-of-day label and its sentiment gauge, we re-tested each on 27 and 28 September 2026, with IWDA added to the TerminalEdge watchlist. Re-test results sit alongside the original findings, dated.

Features that exist on only one platform — TerminalEdge’s Copilot, Daily Brief, Daily Strategy, sentiment gauge and movers list — are kept out of the head-to-head table and covered in their own section. How QuantRoutine tests and scores products is set out in our methodology.

Accuracy

After TerminalEdge’s switch to Twelve Data, its watchlist matched Yahoo Finance’s official close on every instrument we checked: 11 of 11 on 15 September, then 12 of 12 on each of 16, 17 and 18 September. On 18 September, TerminalEdge and Koyfin showed identical closing prices and daily changes on all 11 tickers they had in common, and on SPY.

That wasn’t true before the switch. On 11 September, on the old Alpaca IEX feed, none of 7 instruments matched the consolidated close: 6 read low, by up to 0.07 percentage points. The current feed has fixed that, but it’s the reason the dates in this page matter.

One small inconsistency remains inside TerminalEdge itself: the chart header shows the last intraday candle, while the watchlist shows the official close. At one check, that put AAPL at 331.33 in one place and 331.34 in the other.

European ETFs: both end-of-day, only one says so

This is the row that matters most for European investors. Neither platform shows live prices for UCITS ETFs on the plans tested. TerminalEdge states that European and international instruments, UCITS included, are end-of-day on its current data plan. Koyfin’s help centre says the same for every country outside the US and Canada.

The difference used to be what you saw on screen. During live Xetra sessions on 16 and 18 September, TerminalEdge showed VWCE at the previous day’s close with no end-of-day or delayed label anywhere. Koyfin dated its figure: during the Xetra session on Monday 21 September, it showed VWCE at Friday’s close of €167.14 — labelled Last Updated Fri Sep 18. TerminalEdge closed that gap after this page went live. On Friday 25 September, during a live Xetra session, the VWCE chart header read EOD · Sep 24 beside the daily change. On 27 September, VWCE and IWDA, both added to the watchlist through TerminalEdge’s search, showed the EOD stamp with their 25 September date in the watchlist as well as on the chart header. Both platforms now tell you how old the price is.

Ex-dividend days

On 18 September, SPY went ex-dividend (1.889). Both platforms quoted the unadjusted change of −0.91 (−0.12%) in their headline figures. Koyfin’s chart legend showed the dividend-adjusted change, +0.98 (+0.13%), which matched Yahoo. TerminalEdge showed no adjusted figure anywhere. The same pattern appeared on IWM on 15 September: TerminalEdge showed −0.96% against Yahoo’s −0.70%, a gap equal to the dividend. Neither platform is wrong to quote the unadjusted move, but TerminalEdge’s AI modules then build on it without flagging it — more on that below.

On 27 September, TerminalEdge told us that on a symbol’s ex-date it now re-bases the day’s change against the dividend-adjusted prior close, so the dividend is no longer counted as a loss. On its figures, SPY on 18 September would read about +0.13% instead of about −0.12%. We can only test that on an ex-date, and haven’t yet.

TerminalEdge’s charts are price lines. Hovering shows the date, time and close, and nothing else: there is no volume anywhere in the interface across its 15 modules, no indicator toggle, and no moving average or RSI drawn on the chart. RSI and SMA values appear only as text inside the Deep-Dive module. TerminalEdge’s plan feature list advertises “Interactive charts with SMA/RSI across 8 timeframes”; the chart interface we used did not support that description.

On Koyfin’s trial, volume, a moving average and RSI could all be added to the chart through its series manager. For anyone who reads charts rather than summaries, this is not close.

The economic calendars split the same way. TerminalEdge’s is US-only; its FOMC dates for 16 September and 28 October match the Federal Reserve’s published calendar, but there are no ECB or Eurostat releases. Koyfin’s calendar has a Europe region filter covering 9 countries.

Copilot

We put questions to Copilot throughout the test, including the same end-of-day watchlist question from 16 September onwards. Before the 14 September feed switch, every answer we checked was wrong: it described a volume chart and order-flow panel that don’t exist, presented a stale VWCE price as live and in dollars rather than euros, and couldn’t say whether the US market was open.

After the switch, the numbers improved. In the answers for 17 and 18 September, every figure Copilot cited matched TerminalEdge’s watchlist. The narrative didn’t keep up:

• It called Tesla a “chip play” (16 September), and on 18 September grouped Tesla, down 0.53%, with names showing “stronger momentum”, citing an unsourced bullish signal.
• Asked on a Saturday, it described Friday’s session as “today”.
• Each summary left out 3 to 5 of the 12 watchlist names. The omissions weren’t the smallest movers: on 17 September it skipped WOR and ASML, which moved more than the GOOGL and MSFT figures it did cite.
• It called the watchlist “holdings” — a watchlist isn’t a portfolio.

Its overall reads were right: “solidly green” on 17 September (10 up, 1 flat, 1 down) and “mixed” on 18 September (6 up, 6 down). On 18 September, it reported SPY’s −0.12% — the unadjusted move on an ex-dividend day — without flagging it.

Re-test, Sunday 27 September. TerminalEdge told us Copilot now covers every watchlist name, won’t misclassify a company and won’t call a closed session “today”. Asked “How is my watchlist doing?”, it covered all 13 names on the watchlist. The answer didn’t use “today” or “holdings”, didn’t call Tesla a chip play and didn’t describe ASML as European-listed. One gap remains: its figures came from Friday 25 September’s session, and the answer didn’t date them.

Daily Brief, Market Summary and Deep-Dive

• The Daily Brief said RFIL had fallen for a third consecutive session, by 8.7%, 6.2% and 9.3%. The actual moves were +1.28% on 11 September, −12.31% on 14 September and −9.28% on 15 September.
• It described ASML as European-listed while quoting its Nasdaq USD listing, and attributed MSFT’s move to “whale activity” with no source.
• The Market Summary called XLY, the consumer discretionary sector fund, “defensive”. It correctly reported FTFT at −28.6% and HQ at +27.8%.
• Deep-Dive on VWCE described an RSI of 45 as “approaching oversold” while labelling the same reading “neutral”. Its SMA200 distance of +6.3% was correct.

Re-test: Daily Brief, viewed Sunday 27 September. TerminalEdge told us the brief no longer invents prior-session moves or multi-day history, and covers every watchlist name. Neither held. Its “what moved & why” section covered 6 of the 13 watchlist names, the six largest moves. It said tech had been “the only engine” in the prior two sessions, and also that “the prior read flagged comms and energy leading”. It said IWM’s RSI had “dropped further to 23”, while TerminalEdge’s own Daily Strategy that day had IWM up 0.11%; RSI14 can’t fall on an up close.

Re-test: Deep-Dive, Sunday 27 September. TerminalEdge told us Deep-Dive now uses consistent RSI bands and reads an end-of-day instrument’s price as the last close, not “today”. Both held. On VWCE it wrote “At the last close on 2026-09-25” and called an RSI14 of 57 “firm but not yet overbought”; on ASML it labelled an RSI14 of 53 “neutral”. The arithmetic around those readings didn’t hold:

• It put VWCE at 169.74, “only 1.2% below” resistance at 170.92. The gap is 0.70%.
• It described a support cushion of about 2–3% below the price. Elsewhere it put the SMA20 (167.56) and SMA50 (166.75) roughly 1.2–1.8% lower, which matches our calculation of 1.28% and 1.76%.
• It listed currency fluctuations with VWCE “priced in USD”. Twelve Data, TerminalEdge’s data provider, lists Xetra instruments in euros.

Daily Strategy

In our first test, with “EU ETFs” as its focus, it returned five funds — EWG, FENY, IEZ, FEZ and VGK — all US-listed and none of them UCITS funds. FENY and IEZ are US energy funds offered as European exposure; Shell and BP were described as EU companies; and the reasoning cited a “US diesel export ban” that did not appear in the day’s headlines. For the focus it was asked for, the output was wrong.

Re-test, Sunday 27 September. TerminalEdge told us an EU/UCITS focus no longer returns US-listed funds. That held. With “EU ETFs” as the focus, it said no EU ETF data was available and named no US fund as a European idea. It offered US industrials (XLI) as a labelled fallback, titled “Best Grounded Idea from Available Data”. With VWCE and IWDA as the focus, it quoted both at their 25 September end-of-day close (VWCE +0.49% at 169.74, IWDA +0.42% at 128.91) and cited no invented catalyst. Both runs were generated on Sunday, and both still described Friday’s session as “today” and “the live session”.

Movers

On 15 September, the movers list showed FTFT as the top gainer at +19.01%. It closed −28.61% — which TerminalEdge’s own Market Summary reported correctly — and HQ, up 27.66%, was missing. The list length also varies through the day: roughly 18 minutes after the US open on 18 September it showed one name; at the close it showed ten. TerminalEdge describes the list as “the day’s biggest gainers and losers on real volume”.

Re-test, Monday 28 September. TerminalEdge told us the list now shows gainers and losers across major, liquid US names, with quote-accurate percentages. At 16:03 CET its top gainer was NVDA, +3.20% at 232.28. Yahoo Finance’s figures 17 seconds earlier imply a prior close of 225.07, and 232.28 against 225.07 is +3.20%, so the percentage matches the price shown. We didn’t capture Yahoo quotes for the other nine names. The list is also narrower than before. On Yahoo’s top gainers, NetEase (+4.84%), Venture Global (+3.29%) and Zscaler (+3.08%) were all ahead of TerminalEdge’s second-placed TGT (+1.78%), and none of them appeared on TerminalEdge’s list. It no longer shows the day’s biggest gainers market-wide.

Sentiment gauge

TerminalEdge’s gauge combines breadth (4 indices and 11 sector ETFs), momentum (the S&P 500’s move) and volatility (a VIX proxy, VIXY). Since 28 September it shows the weights on screen: 40% breadth, 35% momentum and 25% volatility, with the formula spelt out. Five samples on the current feed:

“Momentum” is a single day’s SPY move: in all five samples, the score sat close to 50 plus about 20 points per 1% move. That is our estimate from these five readings; TerminalEdge doesn’t show how it converts the SPY move into a score. The weights now on screen reproduce the 28 September composite: 40% × 27 + 35% × 41 + 25% × 46 = 36.65, which rounds to the 37 shown. TerminalEdge still doesn’t show how the volatility score is derived or what its “Vol proxy” measures. Treat the gauge as a one-day snapshot, not a trend measure.

TerminalEdge

Pro is listed at $29 a month, with a founding rate of $19 a month labelled “locked for life”. The pricing page says the price will rise to $29 as features are added, while existing members keep their rate. The annual plan is $190 billed yearly ($15.83 a month). Both come with a 14-day free trial and no card required.

AI usage runs on daily limits in separate pools: 50 Copilot questions, 20 Deep-Dives, and 3 each of Market Summary, Daily Strategy and Why It Matters. The header says “50 credits included every day”, which doesn’t match the 79 actions those pools add up to. Extra credits cost $5 for 50, $12 for 150 and $35 for 500, and don’t expire.

Two points from TerminalEdge’s own documents are worth reading before you sign up. First, the Terms we read on 13 September said prices may change with notice, which sat awkwardly next to “locked for life” on the pricing page; TerminalEdge told us it has since reconciled the two. Second, refunds: monthly payments are non-refundable once renewed, annual plans have a 14-day good-faith window, and nothing is pro-rated. The EU withdrawal-right waiver in the Terms covers AI credits and says nothing about the subscription itself.

For context on the price: Twelve Data’s Venture business plan, which TerminalEdge’s founder names as its data plan, starts at $149 a month. TerminalEdge’s exact tier and costs aren’t public. Whether a $19 rate can be held for life is a fair question to keep in mind, not something we can answer.

Koyfin

Koyfin’s paid plans are priced on annual billing: Plus from $39 a month, Premium $79, and advisor plans at $209 and $299. The free plan is permanent and includes 2 years of financials and 1 year of estimates, portfolio tracking, advanced charting, market and macro dashboards, 2 watchlists, 2 screens and 2 custom dashboards, with limited company snapshots, news and market movers. The 7-day trial unlocks everything and then drops back to the free plan instead of charging you. Refunds: a full refund within 30 days under Koyfin’s satisfaction guarantee.

We read TerminalEdge’s Terms and Privacy Policy in the versions dated 13 September 2026, linked from the logged-out homepage. At that point, a few points didn’t line up with the product as it ran:

• Real-time vs delayed. The Terms described “real-time market data” in one section and, in another, said data from Alpaca’s IEX feed may be delayed. On screen at that point, European prices were end-of-day with no label.
• Data provider. The Terms and Privacy Policy named Alpaca (IEX feed). The app footer named Twelve Data, which the legal pages didn’t mention.
• Trial length. The 14-day trial appeared on the pricing page but not in the Terms.

On the other side, those versions were governed by Irish law, kept the home-country protections of EU consumers, and limited the service to personal use. The Privacy Policy named Anthropic as the AI provider, used the Meta Pixel subject to consent, and named Ireland’s Data Protection Commission as the supervisory authority.

After reviewing a draft of this page, TerminalEdge told us it had updated its legal pages to name Twelve Data for market data (with Alpaca for news), qualify “real-time” as US real-time and international end-of-day, state the 14-day trial, and reconcile “locked for life” with the price-change clause. Read the current versions before you subscribe.

TerminalEdge is for a US-focused investor who wants the day summarised and is prepared to check what they’re told. Its prices were accurate once its feed changed, and the sentiment gauge and movers list are quick to scan. But in our first test, every AI-written module we checked — Copilot, Daily Brief, Market Summary, Deep-Dive and Daily Strategy — made at least one factual error, and some made several. In the re-test after TerminalEdge’s fixes, Copilot passed our checks and Daily Strategy stopped offering US funds as European ones. The Daily Brief still contradicted itself, and Deep-Dive still got its own arithmetic wrong. At $19 a month, it works as a prompt — “what moved, and why might that be?” — not as a source you can quote.

Koyfin is for anyone who wants to research rather than be briefed: charting with volume and indicators, European economic data and fundamentals. The free plan covers a lot of that, and the 30-day refund makes a paid month low-risk. It costs more.

For a European investor holding UCITS ETFs, neither gives live prices on the plans tested, and both now say so on screen. In our first test, TerminalEdge’s AI output leaned on US instruments even when asked about European ones. In the re-test, Daily Strategy said it had no European ETF data instead of substituting US funds. Koyfin is still the better default for this site’s readers. TerminalEdge is a young product: it changed its data provider during our test, added the end-of-day stamp within days of this page going live, and fixed Copilot and Daily Strategy on the points we re-tested. If the Daily Brief and Deep-Dive follow, this comparison would change.