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Arty's Block Trades Indicator

"Volume at the price. Follow the big players."

Master the order flow by identifying institutional block trades and significant volume clusters in real-time on NinjaTrader 8.

Your chart shows you price. It doesn't show you who's actually trading it.

Large buy and sell orders happen at specific prices, not just at specific points in time. A standard volume bar at the bottom of your chart tells you that a lot of volume was traded – but not where, and not whether it came from aggressive buyers or aggressive sellers at that price.

Volume without a price is just a number. Volume at a price is a decision.

I wanted to see where big money was trading – so I built a way to see it directly on the chart.

I built this for the same reason I built every other tool on this site: I needed it myself. I wanted to know, at a glance, where large block trades were printing and whether buyers or sellers were in control – without switching to another tool or trying to interpret a volume bar.

I've built entire setups around the biggest block trades.

How it works

  1. Add the indicator to your chart and set your minimum block size – either as a fixed volume or dynamically based on the largest block trade of the day.
  2. Every block or cluster trade appears as a bubble at the exact price where it was executed – green for buying pressure, red for selling pressure, with the bubble size proportional to volume.
  3. On higher timeframes, switch to Bar View and increase the minimum block size to highlight the most significant clusters and shifts in order flow.

All volume block trades at a glance

The Block Trades Indicator for NinjaTrader displays large block and cluster trades as a volume overlay right on your chart at the exact price where the block printed. Green highlights strong buying, red highlights heavy selling. Bubble size scales with the block volume so you instantly see where institutional orders and volume clusters are stepping in. Works even with the free version of NinjaTrader.

NinjaTrader 8 Block Trade Bubbles
Sizes, colors, and settings are fully customizable.

Bar view for higher timeframes

On higher timeframes (e.g. 1H or 4H) the bar view bundles block and cluster trades so you can spot dominant volume clusters, shifts in order flow, and volume spikes fast. That way you quickly see who is driving the market.

Volume Cluster Chart
Hover a bar or bubble to see block size and additional data instantly.

Easy to configure – every vital parameter in one place

Customize the indicator for your volume setup: set the minimum block size, choose blocks, cluster trades or both, decide if bubbles persist, and pick dynamic sizing (largest block trade of the day) or fixed tiers—so it fits your orderflow/volume-profile workflow.

Order Flow Liquidity Analysis
If you have any questions, I’m happy to help via Contact

Your Order Flow Advantage

  • Block trades on your chartEvery large block or cluster trade appears as a bubble right at the price it printed, colored by buying or selling pressure.
  • Volume clusters, not noiseBubble size scales with block volume, so dominant clusters stand out instead of blending into the chart.
  • Built-in bar viewOn higher timeframes, prints are bundled into bars so shifts in order flow are visible at a glance.
  • Works with the free NinjaTrader licenseNo NinjaTrader OrderFlow Package needed to see block and cluster trades on your chart.

Try everything free for 14 days

Not just the Block Trades Indicator: all my other tools are included, Account Guard and the Trading Journal among them.

If it helps you make one better decision today, it has paid for itself for the rest of the year.

Start Your Free 14 Days – All Tools

No credit card required · No automatic charges