# Optimizing Trading with brTOKENS

What makes Arbera's system more efficient is how `brTOKEN` pools work alongside `TOKEN` pools. Instead of relying solely on `TOKEN` liquidity, transactions can be split using aggregators (e.g., OOGA BOOGA) between `TOKEN` and `brTOKEN` pools to optimize outcomes.

#### Example:

A user wants to buy **$50,000** worth of `PORRIDGE`, purchasing directly from the `PORRIDGE` pool would result in **8% slippage**, leaving the user with only **$46,000** worth of `PORRIDGE`.

Splitting the purchase between the `PORRIDGE` and `brPORRIDGE` pools, the user can reduce the overall slippage and fees, ending up with a better outcome.

User splits the purchase:

* **$30,000** towards `PORRIDGE`, which has **5% slippage**, and
* **$20,000** towards `brPORRIDGE`, which also has **5% slippage** due to its smaller size and incurs a **1% Den fee**.

#### Calculations:

**For PORRIDGE (larger pool):**

* **$30,000** with **5% slippage**:  $28,500 worth of `PORRIDGE`.\
  $$30,000 \times (1 - 0.05) = 28,500$$

**For brPORRIDGE (smaller pool with fee):**

* **$20,000** with **5% slippage**: $19,000 worth of `brPORRIDGE`.

  $$20,000 \times (1 - 0.05) = 19,000$$
* After applying the **1% Den fee**:\
  $$19,000 \times (1 - 0.01) = 18,810$$

#### Total Outcome  :

* **$28,500** `PORRIDGE` + **$18,810** `brPORRIDGE` = **$47,310 worth of** `PORRIDGE`


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