Reasonable Trader is a mullticurrency Expert Advisor. It is neither martingale, nor grid.

The product works with 5 and 4 decimal places in a quote.

Real account monitoring: https://www.mql5.com/en/signals/29928

Demo account monitoring: https://www.mql5.com/en/signals/30047

Used Indicators:

•  Moving Average of Oscillator
•  Stochastic Oscillator
•  Moving Average 
  
•  The filter based on "Elder impulse system"

The Expert Advisor's Functionality:

• The parameters are adjusted automatically for a 5-digit quote. For five decimal places in the quote, such parameters as "t_p=150"- (take profit level = 150 points) are multiplied by 10 (take profit level = 1 500 points).
• "stop-loss" dynamic level. It is calculated considering the market volatility.
• Lot size calculation depending on "stop-loss" and risk percentage value. 
• Filtration of the deals, at which the losses may exceed the specified level (even if the risk for a deal does not exceed permissible value).
• Three-level "trailing stop" by maximums and minimums.
• Moving "stop-loss" to break-even point.
• One or several indicators, or a filter can be disabled. If you disable one or several indicators, you can trade more aggressively.

Parameters:

• comment - user comment displayed on the chart.
• "Level of take profit" - function name.
• t_p - take profit level in points.
• "chart period for calculating stop-loss" - function name.
• tm_sl - chart period for stop loss calculation.
• "number of bars for calculating stop-loss" - function name.
• Numb_bars_sl - number of bars for calculating stop loss level.
• "The maximum level of stop-loss" - function name.
• Level_sl - maximum allowed stop loss level.
• "percent of risk" - function name.
• Risk_persent - percentage value of possible losses per deal.
• "Minimum Lot" - function name.
• LotMin - minimum lot size.
• "Maximum Lot" - function name.
• LotMax - maximum allowed lot size.
• "maximum orders in each direction" - function name.
• PosMax - maximum number of open positions in each direction.
• "Filtering by Elder Impulse System" - function name.
• Filtering_on - (true-false) enable/disable "Elder Impulse System" filter.
• MACD_FastPeriod - fast MACD period.
• MACD_SlowPeriod - slow MACD period.
• MACD_SignalPeriod - MACD signal line period.
• EMA_Period - MA period.
• PRICE - calculation price.
• "Trigger-1 - Stochastic Oscillator" - function name.
• Trigger_1_on - (true-false) enable/disable Stochastic Oscillator signal.
• k_per - Stochastic Oscillator K period.
• D_per - Stochastic Oscillator D period.
• slow - deceleration.
• st_price - calculation price.
• method - MA method for Stochastic Oscillator calculation. 
• signal_duration_1 - duration of the signal in bars since it has appeared.
• "Trigger-2 - Moving average" - function name.
• Trigger_2_on - (true-false) enable/disable Moving Average signal.
• Ma_Period - Moving Average period.
• Ma_Shift - Moving Average shift.
• Ma_Method - Moving Average method.
• Price - Moving Average price.
• signal_duration_2 - duration of the signal in bars since it has appeared.
• "Trigger-3 - OsMa" - function name.
• Trigger_3_on - (true-false) enable/disable OsMa signal.
• OsMaFast_ema_period - fast MA period.
• OsMaSlow_ema_period - slow MA period. 
• OsMaSignal_period - signal line period.   
• OsMaFilter_ema_period - MA period calculated using OsMa.
• signal_duration_3 - duration of the signal in bars since it has appeared.
• "MagicNumber" - function name.
• magic=487692 - "magic" number.
• Close_order - (true-false) closing positions if an opposite signal appears.
• "break-even after (b_e) pips" - function name.
• b_e - moving STOP LOSS to the break-even level after "b_e" points.
• "trailing stop-1" - function name.
• Tral1 - (true-false) enable/disable the trail's first level.
• tral1_after_pips - trail #1 operation start after "tral1_after_pips" points.
• "trailing stop-2" - function name.
• Tral2 - (true-false) enable/disable the trail's second level.
• tral2_after_pips - trail #2 operation start after "tral2_after_pips" points.
• "trailing stop-3" - function name.
• Tral3 - (true-false) enable/disable the trail's third level.
• tral3_after_pips - trail #3 operation start after "tral3_after_pips" points.

Recommendations:

• It would be better to perform optimization on M15 chart by open prices.
• Since the Expert Advisor rarely performs trading actions, it would be better to launch it on several currency pairs.
• Be sure to change "magic" numbers for different currency pairs.