Smart position sizing & risk management

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Market Structure

Market Maker

A firm or individual that continuously quotes both a buy and sell price for a security, providing liquidity so other traders can execute orders quickly.

What is a Market Maker?

A market maker is a firm that stands ready to buy and sell a particular stock at publicly quoted prices throughout the trading day. They post a bid price (what they will buy at) and an ask price (what they will sell at), and they profit from the spread between the two. In exchange for taking on this risk, they provide liquidity so that other traders can get in and out of positions quickly.

How they actually work

  • Two-sided quotes: they generally post both a bid and an ask price, though they can widen spreads or pull quotes during extreme volatility
  • Profit from the spread: if the bid is $49.98 and the ask is $50.00, the market maker earns $0.02 per share on a round trip
  • Manage inventory: they accumulate and offload shares throughout the day to stay roughly neutral. They are not trying to predict direction, they are trying to capture spread
  • Your orders flow through them: when you hit "buy" on your broker app, a market maker is often the one filling your order. Brokers like Robinhood and Webull route orders to firms like Citadel Securities in exchange for payment (this is called payment for order flow)

The "manipulation" question

If you watch trading videos on YouTube, you have probably heard someone say "market makers are manipulating the chart" or "institutions are hunting your stop loss." Here is what is actually happening:

  • Liquidity pools: market makers and institutional traders need liquidity (large clusters of orders) to fill their positions. Stop losses, limit orders, and support/resistance levels are where those orders cluster. Price naturally moves toward liquidity because that is where orders can get filled
  • Stop runs: when price dips just below a key support level, triggers a wave of stop losses, and then immediately reverses, it looks like manipulation. In reality, those stop loss orders created a pool of sell orders. Larger players (institutions, algorithms, market makers) buy into that selling because they need volume to fill large buy orders. The reversal happens because the selling exhausts itself
  • They see order flow: market makers have visibility into incoming orders, which gives them an information edge. This is not illegal. It is how the system is designed. They use this information to manage their inventory and risk
  • It is not personal: market makers are not watching your individual account. They are responding to aggregate order flow. If price takes out your stop, it took out thousands of stops at the same level

What "institutional manipulation" usually is

When YouTubers say "institutions are manipulating the market," they are usually describing one of these real but misunderstood behaviors:

  • Iceberg orders: institutions break large orders into small pieces to hide their true size. This makes it look like there is no big buyer or seller, but the stock keeps drifting in one direction
  • Accumulation and distribution: institutions buy slowly over days or weeks (accumulation) and sell slowly (distribution). This creates the choppy, range-bound action that frustrates retail traders
  • Dark pool execution: large orders executed off-exchange so they do not move the visible order book. Retail traders cannot see these until after they print
  • Algorithmic execution: institutions use VWAP, TWAP, and other algorithms that slice orders across the day. This creates predictable patterns around VWAP that experienced traders learn to read

The practical takeaway

The market is not rigged against retail traders, but it is not a level playing field either. Institutions have better data, faster execution, and more capital. The way to succeed is not to fight them but to understand how they operate and position yourself accordingly. Place stops at levels that account for normal market noise, not at obvious round numbers where everyone else puts theirs.

Instead of thinking "market makers took my stop," think "I put my stop where everyone else did, and price moved to that liquidity." That shift in perspective changes how you plan trades.