---
title: prom
description: Display dark pool (ATS) data of tickers with growing trades activity
  using linear regression. Filter and process data from different tiers.
keywords:
- prom
- dark pool
- ATS data
- trade activity
- linear regression
- data filtering
- tier processing
---

import HeadTitle from '@site/src/components/General/HeadTitle.tsx';

<HeadTitle title="stocks/dps/prom - Reference | OpenBB Terminal Docs" />

Display dark pool (ATS) data of tickers with growing trades activity using linear regression.

### Usage

```python
prom [-n N_NUM] [-l LIMIT] [-t {T1,T2,OTCE}]
```

---

## Parameters

| Name | Description | Default | Optional | Choices |
| ---- | ----------- | ------- | -------- | ------- |
| n_num | Number of tickers to filter from entire ATS data based on the sum of the total weekly shares quantity. | 1000 | True | None |
| limit | Limit of most promising tickers to display. | 10 | True | None |
| tier | Tier to process data from. |  | True | T1, T2, OTCE |

![prom](https://user-images.githubusercontent.com/46355364/154076323-2d031477-a70d-4065-b649-c8493fecdcbc.png)

---