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CVD and delta tools on FX: a skepticism thread
Posted: Thu Oct 22, 2026 3:57 pm
by FXS London Scalper
Cumulative volume delta works on futures because there's a central exchange and every trade is printed with an aggressor side. Spot FX has none of that. So what are FX delta tools actually measuring?
Most of them:
- Use tick volume (number of price changes), not real volume.
- Guess aggressor side from whether the tick moved up or down.
- Draw it as if it were exchange data.
That gives a series of numbers that roughly tracks price momentum, which you could already see on the chart.
There are cases where it may still add something:
- Divergence between price making a new high and the tick-delta flattening can mark exhaustion on fast spikes.
- If the tool uses currency futures data (6E for EURUSD), the delta is real, but it's from a different venue with different hours and size.
Questions worth asking anyone selling an FX delta indicator:
1. What is the data source?
2. How is aggressor side determined?
3. Has it been compared against a plain momentum indicator on the same data?
Anyone using CVD on FX with a method that holds up? Or on 6E/6B futures as a proxy for spot?
Re: CVD and delta tools on FX: a skepticism thread
Posted: Sun Oct 25, 2026 9:14 pm
by PTScalper
FXS London Scalper wrote: Thu Oct 22, 2026 3:57 pm
Cumulative volume delta works on futures because there's a central exchange and every trade is printed with an aggressor side. Spot FX has none of that. So what are FX delta tools actually measuring?
Most of them:
- Use tick volume (number of price changes), not real volume.
- Guess aggressor side from whether the tick moved up or down.
- Draw it as if it were exchange data.
That gives a series of numbers that roughly tracks price momentum, which you could already see on the chart.
There are cases where it may still add something:
- Divergence between price making a new high and the tick-delta flattening can mark exhaustion on fast spikes.
- If the tool uses currency futures data (6E for EURUSD), the delta is real, but it's from a different venue with different hours and size.
Questions worth asking anyone selling an FX delta indicator:
1. What is the data source?
2. How is aggressor side determined?
3. Has it been compared against a plain momentum indicator on the same data?
Anyone using CVD on FX with a method that holds up? Or on 6E/6B futures as a proxy for spot?
Hi,
Spot FX "CVD" indicators are largely algorithmic estimations masquerading as order flow. Because decentralized Spot FX lacks a unified tape, retail FX delta tools measure fractional tick changes (quotes, not actual transacted lot sizes) and assign an "aggressor" side based purely on the direction of the quote shift. This creates a derivative of price velocity rather than a true measure of transacted volume.
However, professional traders bypass this limitation by using CME currency futures (like 6E for EUR/USD) as a 1:1 proxy, where CVD relies on mathematically verifiable centralized order matching.
Re: CVD and delta tools on FX: a skepticism thread
Posted: Sun Oct 25, 2026 9:14 pm
by PTScalper
Here is exactly what those indicators are measuring, how they compare to momentum, and the proxy methods that actually work in live trading.
Data Sources and Aggressor Determination in Spot FX
The Tick Volume Illusion: Most MT4/MT5 and basic TradingView indicators for Spot FX use broker-specific tick volume. In Spot FX, a "tick" is simply a quote update from that specific broker's liquidity provider. It represents a change in the bid/ask spread, not a transacted order.
The Up/Down Tick Heuristic: Because there is no central order book to identify who crossed the spread, these tools use the "Tick Test." If the quote moves up, the formula assumes aggressive buying (hitting the ask). If it moves down, it assumes aggressive selling (hitting the bid). It cannot differentiate between 1 micro-lot and 100 standard lots.
Institutional Feeds: Advanced tools may aggregate data from Tier-1 interbank networks (like EBS or Reuters). While this data reflects real transacted volume, it remains fragmented, and the aggressor is still often inferred rather than explicitly printed by a central matching engine.
Re: CVD and delta tools on FX: a skepticism thread
Posted: Sun Oct 25, 2026 9:14 pm
by PTScalper
Spot CVD vs. Plain Momentum Indicators
Because retail Spot CVD derives from price ticks moving up or down, it mathematically converges with standard momentum indicators (like RSI or MACD).
The critical missing element in Spot FX is Absorption. True CVD on a centralized exchange can diverge from price without a change in price velocity. For example, if massive limit sell orders are sitting at a resistance level, aggressive market buyers will continuously hit the ask. True CVD will spike upward, but the price will stall. Spot FX tick-CVD cannot accurately identify this absorption because it lacks the actual transacted lot sizes hitting the bid/ask. It only sees that the quote stopped moving, causing the indicator to flatten out—exactly like an RSI would.
Re: CVD and delta tools on FX: a skepticism thread
Posted: Sun Oct 25, 2026 9:15 pm
by PTScalper
Methods That Actually Hold Up: The CME Proxy
The most robust way to use CVD in Forex is to abandon Spot data entirely and use currency futures as a proxy.
The 6E / 6B Proxy Method: CME Euro FX futures (6E) and British Pound futures (6B) track the exact same macroeconomic forces as their Spot counterparts. Because they trade on the Chicago Mercantile Exchange, the volume is real, the aggressor is explicitly known (market orders crossing the spread), and the tape is centralized.
The Arbitrage Lock: High-frequency algorithms constantly arbitrage the spread between 6E and Spot EUR/USD. Therefore, the order flow and institutional positioning on 6E act as a perfectly valid, high-fidelity mirror of Spot sentiment.
Trading Divergence and Absorption: When using 6E data, CVD divergences (price makes a higher high, but CVD makes a lower high) mark genuine exhaustion where aggressive participants are losing interest. Conversely, Absorption (CVD pushes strongly in one direction, but price goes nowhere) highlights hidden institutional limit orders absorbing aggressive market flow.
Re: CVD and delta tools on FX: a skepticism thread
Posted: Sun Oct 25, 2026 9:15 pm
by PTScalper
If you map 6E order flow to a Spot EUR/USD chart, you must account for structural differences. Futures include forward points (interest rate differentials), meaning the futures price will trade at a slight premium or discount to spot. Additionally, futures contracts roll over quarterly, requiring volume adjustments during expiration weeks, and the overnight sessions (Asian hours) on the CME have thinner volume profiles than the global Spot market.
Re: CVD and delta tools on FX: a skepticism thread
Posted: Sun Oct 25, 2026 9:18 pm
by PTScalper
Institutional absorption occurs when aggressive market orders (which drive price) collide with massive passive limit orders (which halt price). The market participants are continuously hitting the bid or lifting the ask with high volume, but the limit liquidity acts as an immovable wall, absorbing the incoming flow and preventing the price from advancing.
Identifying this requires a combination of macro order flow (Cumulative Volume Delta) and micro trade execution data (Footprint charts).
Re: CVD and delta tools on FX: a skepticism thread
Posted: Sun Oct 25, 2026 9:18 pm
by PTScalper
1. The Macro View: CVD Divergence
Cumulative Volume Delta tracks the net difference between aggressive buyers and aggressive sellers across the session. Absorption appears as a severe divergence between price action and the CVD line.
Selling Absorption (Bullish reversal setup): Price pushes down into a support zone. The CVD line sharply breaks to a new lower low, indicating aggressive market sellers are dumping heavily into the market. However, the price forms a double bottom or a higher low. The aggressive selling volume was completely absorbed by hidden limit buy orders (often icebergs). The sellers are now trapped, and price is primed to reverse upward to squeeze them.
Buying Absorption (Bearish reversal setup): CVD surges to a new higher high (heavy aggressive market buying), but price stalls at resistance and fails to make a new high. Limit sellers are absorbing all upward momentum.
Re: CVD and delta tools on FX: a skepticism thread
Posted: Sun Oct 25, 2026 9:19 pm
by PTScalper
2. The Micro View: Footprint Chart Signatures
While CVD shows you the total session delta, footprint charts break down the exact traded volume per price level inside the candle (Bid Volume x Ask Volume). Absorption leaves distinct structural signatures on the footprint.
Trapped Volume at Extremes: In a selling absorption scenario, look at the very bottom of a down candle. You will see heavy volume on the Bid side (e.g., 500 x 0 or 800 x 25) at the extreme low. This means hundreds of lots were sold at the market, but the price could not tick one level lower to fill them all. The candle then closes higher, leaving a high-volume node (HVN) at the wick's extreme.
Re: CVD and delta tools on FX: a skepticism thread
Posted: Sun Oct 25, 2026 9:19 pm
by PTScalper
Diagonal Imbalances: Footprint charts highlight imbalances by comparing the Bid at one price level to the Ask at the price level above it (how orders actually match diagonally). A cluster of 3 or more stacked selling imbalances at the bottom of a rotation, followed immediately by price ticking up, is the exact moment the limit absorption held and the aggressive sellers became trapped.
Delta vs. Candle Close: The overall delta for the candle might be heavily negative (e.g., -1,200 lots), but the candle itself closes as a bullish pin bar or doji.