MarketApp Bull Pen · Desktop beta

Your next generation of traders starts here.

Create trader strategies, replay saved market history, and compare the results in an expanded leaderboard. Choose the download for your computer.

New · Windows beta

Bull Pen for Windows

For Windows 10 or 11 on an Intel or AMD 64-bit PC.

Version0.2.6
FormatPortable ZIP · Python included
Publisher signingUnsigned beta

Download for Windows Verify download

0.2.6 fixes runs stopping when indicator warm-up reaches before the saved history. Available trading bars now load even when earlier warm-up months are empty. Missing periods remain recorded in the run data notes. Choose Fastest to use the CPU and available RAM budget. The app shows physical cores, logical processors and available memory. Stock history loads from your MarketApp account automatically. A new Refresh ticker list button lets you retry a connection.

Windows may show an unrecognized-publisher warning for this beta. Microsoft Edge WebView2 Runtime is required; it is included on most current Windows PCs.

Get WebView2 from Microsoft

Mac beta

Bull Pen for Mac

For Apple-silicon Macs (M1 or newer) running macOS 13 Ventura or later.

Version0.2.4
FormatApplication ZIP
Publisher signingSigned and notarized

Download for Mac Verify download

The Mac build is signed with an Apple Developer ID and notarized by Apple. This download is for Apple silicon; an Intel Mac build is not available.

Installation

Download, open, and sign in.

01
Extract the download

On Windows, right-click the ZIP and choose Extract All. Keep the entire extracted folder together. On Mac, open the ZIP and drag MarketApp Pen into Applications.
02
Open Bull Pen

On Windows, open MarketApp Pen.exe inside the extracted folder. On Mac, open MarketApp Pen from Applications.
03
Connect your account

Choose Sign in to your MarketApp account. In the phone app, go to Account → Link a computer and enter the displayed code to access your saved stock history.

What is included

More room to review your research.

Swing trading preset

Choose 30-minute, 1-hour or 2-hour bars, with overnight holding and trading-session holding limits.

Expanded leaderboard

Give the leaderboard the main window and keep the animated traders in a smaller view. Swap them whenever you like.

Trader exports and recovery

Save sortable spreadsheets and importable trader profiles. When signed in, completed runs can also save a recovery copy to MarketApp. Keep the app open until saving finishes.

This is research software. Windows 0.2.6 supports multiple replay workers. Fastest leaves one logical processor for coordination and budgets up to 80% of RAM; large histories and other apps can reduce the worker count. Alternative cloud providers and multi-computer runs are still in development. No API keys or signed-in account are included in either download.

Send beta feedback