通达信软件 widely used among Chinese investors supports condition orders and new stock subscription features through various securities firms. Some of the securities firms that support these features include:

1. **Huatai Securities** - Huatai offers robust support for both condition orders and new stock subscriptions through the Tongdaxin platform.
2. **Guosen Securities** - Guosen Securities also supports these features, providing a seamless experience for investors using Tongdaxin.
3. **Zhongtai Securities** - Known for its technological advancements, Zhongtai Securities supports condition orders and new stock subscriptions on Tongdaxin.
4. **Guangfa Securities** - Guangfa Securities provides full support for these features, making it convenient for investors网上办理开户是很方便的，开户的流程非常简单，下载APP点击一键开户，准备好本人身份证和银行卡，10分钟就可以完成！点击右上角联系我，佣金超大优惠，大资金量折上折！！犹豫=亏钱！竞争力费率计算器，输入交易量立见分晓！