What is the minimum tradable lot size?

The minimum trade size is 0.01 lots.

Example 1:
For currency pairs, the Contract Size value is 100,000.
This means that the trading volume of 1 lot is equal to 100,000 units of the base currency. Therefore, the minimum tradable lot size 0.01 lots for currencies is equal to:
0.01*100,000 = 1000 units of the base currency

Example 2
In the trading terminal for Gold (XAUUSD), the Contract Size value is 100.
This means that the trading volume of 1 lot equals 100 units of XAU (Gold).
Therefore, the minimum tradable lot size of 0.01 lots for metals is equal to:
0.01*100 = 1 units of XAU (Gold)

The number of base currency units in 1 lot is specified in the contract specifications. You can find this data on the instrument specifications page or our trading platform.