Input parameters defaultInstrument: NZD/JPY - instrument used defaultTradeAmount: 3.5 - amount used in position size calculation defaultSlippage: 5 - maximum allowed slippage in pips defaultStopLoss: 233 - stop loss in pips defaultTakeProfit: 977 - take profit in pips defaultPeriod: 1 Min - period closePosition: true - close open position maxSpread: 4.0 - maximum allowed spread in pips maPeriod: 2 - time period of H4 exponential moving average (ema) adjustRatio: 0.99 - used in position size calculation formula adjustPips: 7.0 - number of pips after which to recalculate position size Trading logic 1. Starts execution in onCandle event handler. Continues only if candle instrument equals defaultInstrument and candle period equals defaultPeriod. 2. Calculates spread and compares it to maxSpread. Continues only if spread is lower than maxSpread. This filters out unfavorable trading conditions. 3. Checks number of positions. 3.a If there are no positions it calculates two values from H4 ema (with time period maPeriod, based on closing prices). First is for two H4 periods back, second for one H4 period back. It resets tradeNum to zero. It sets amount to defaultTradeAmount. It compares first ema value with the second and opens short position if the first is greater than the second or long position otherwise. Position is opened using: - defaultInstrument - amount - defaultSlippage - defaultStopLoss - defaultTakeProfit It increases tradeNum by 1. 3.b If there are positions, it checks if there are open (filled) positions. If closePosition is true, it closes open position, resets closePosition to false and returns. If there are open positions (assuming no bugs, this means one open position), it checks position profit. If position profit is greater than adjustPips, it continues execution. It saves position stop loss and take profit prices to sl and tp variables. It calculates position size with the following formula: amount * adjustRatio. It decreases position size gradually, while running towards the target and possibility of reversal rises. It updates (tightens) sl by as much as position moved in profit. It closes position and then reopens it, using: - defaultInstrument - amount (updated) - defaultSlippage - sl (updated) - tp (same as initial) It increases tradeNum by 1.