What is the minimum investment amount?

https://www.t4trade.com/en/ 

T4Trade is not a licensed or regulated broker even though it states offers that look good to be true. 

T4Trade claims to be a trade name of Tradeco Limited, a company regulated by the Seychelles Financial Services Authority (Seychelles FSA) with licence number SD029. So we searched Seychelles FSA and found the company. However, the information on the website of the regulatory body, such as the address, did not match the information on T4Trade's website. In other words, T4Trade is not regulated by Seychelles FSA.

Moreover, both the Spain Comisión Nacional del Mercado de Valores (CNMV) and the France Autorité des Marchés Financiers (AMF) issued warnings that T4Trade was not authorized to provide forex services. You can full warnings from CNMV and AMF

The truth is, T4Trade is not overseen by any regulators. That means your personal data or your funds in this broker are unsafe and cannot be protected by any law. We would recommend traders stay away from unregulated brokers like T4Trade and trade with licensed brokers