If i would like to buy and hold investments in stock market for 5-10 years, should i go with SaxotraderGO? Does the platform allows me to have long term holding or only for day trading?

TD Ameritrade and FSMOne or POEMS are all what You need.

Trading fees are so low today, for buy & hold investor almost unimportant.

SaxoTraderGO is their trading platform - you will still need a Saxo account to trade on it, which comes with its associated fees. Their platform allows for long-term holding.

Generally, I do not recommend Saxo for their currency conversion fee (0.75%), custody fee (0.12% p.a.), and high commissions of minimum 8 GBP on the LSE if you plan to hold Irish-domiciled ETFs for lower withholding taxes.

To determine what broker is best for you, you need to consider a few things first:

• Commissions (cost per trade)

• Fees (custody, currency conversion, dividend handling, corporate action)

• Market availability

• Trustworthiness

• Ease of use

You can read my other answers here and here where I did a comparison between 4 brokers - Saxo, SCB, Tiger and IBKR.​​​