Martingale EA base on Stochastic Oscillator

Hello, I would like to build a EA, strategy is:

Step 1. Determine the direction

Use H4 Stochastic Oscillator

If 30 < Stochastic Oscillator < 70 and going up, we consider to buy

If 30 < Stochastic Oscillator < 70 and going down, we consider to sell

Stochastic Oscillator > 70 or Stochastic Oscillator < 30, don’t trade.

Step 2. Open Order

Base on step 1 direction, use current timeframe Stochastic Oscillator to open order.

If Stochastic Oscillator > 30 and previous candle Stochastic Oscillator < 30, then buy

If Stochastic Oscillator < 70 and previous candle Stochastic Oscillator > 70, then sell

Step 3. Close Order

Also current timeframe

Buy order: when Stochastic Oscillator = 70 and profit, close it.

Sell order: when Stochastic Oscillator = 30 and profit, close it.

Please calculate commission & swap in profit

Martingale:

If already opened a position and losing, when the strategy achieves Step 2 again, open a same direction order, multiple can be set by myself. Martingale orders totally can be 6 orders, after 6 orders, if still losing, then when the next time achieves Step 3, close all even though there are losing.

Stochastic Oscillator parameters:

K=10, D=8, Slowing =8, Price field = Low/High, MA method = Simple

All Stochastic Oscillator data means main line, not signal line

Other parameters:

Fix lot

Auto lot (0.05 lot per 1000 USD blance)

Spread

Slippage

Poor in English, hope you understand what I said.

Regards