42 Application service provider featuring application programming interface (API) software for stock trading; Software as a service (SAAS) services featuring software for stock trading management, order management, trading routing management, back office accounting management, clearing system management, and trading simulations; Providing temporary use of on-line non-downloadable software development tools for stock trading; Application service provider featuring application programming interface (API) software for cryptocurrency trading; Software as a service (SAAS) services featuring software for cryptocurrency trading management, order management, trading routing management, back office accounting management, clearing system management, and trading simulations; Providing temporary use of on-line non-downloadable software development tools for cryptocurrency trading; Application service provider featuring application programming interface (API) software for securities, options, futures, alternative assets and forex trading; Software as a service (SAAS) services featuring software for securities, options, futures, alternative assets and forex trading management, order management, trading routing management, back office accounting management, clearing system management, and trading simulations; Providing temporary use of on-line non-downloadable software development tools for securities, options, futures, alternative assets and forex trading