Creating a trading robot using the concept of Exponential moving average cross over strategy or EMA golden cross strategy

I want a trading robot that will open and close trades using the golden cross strategy, it is a very simple strategy to understand. This robot will execute trades using Exponential moving average (EMA). The EMA's used are the 3 EMA and the 10 EMA. A buy trade will be triggered when the 3 EMA crosses the 10 EMA to the upward direction, and a sell trade will be opened when the 3 EMA crosses the 10 EMA to the downward direction. They will be no stop loss or take profit, instead if a buy trade has been executed and running and an opposite signal occurs, the buy trade will be closed immediately and a sell trade will be triggered or opened and if a sell trade is opened and running and an opposite signal occurs (signal for buy trade), the trading robot should close the sell trade immediately and open a buy trade. The trading robot should be able to work on any pair and any time frame, I should be able to increase or reduce the lotsize it uses to open a trade by myself, I should also be able to increase or reduce the number of trades it will open per signal or at a time. Remember, positions are closed at opposite signals and the new trade signal is opened, there are no stop loss or take profit. It is a very simple strategy.