Free Tool: Dynamic ATR Stop Loss Calculator for MT4 & MT5 Scalpers
Posted: Sun Jul 26, 2026 3:34 pm
Are you still using fixed pip stop losses for your scalp trades? In fast-paced forex scalping, relying on static 5 or 10-pip stops is the fastest way to get stopped out by normal market noise. Volatility shifts constantly between trading sessions. That is why I prepared this lightweight, dynamic Average True Range (ATR) Stop Loss Calculator for both MT4 and MT5.
Why is an ATR-based stop essential for scalping? ATR measures true market volatility over a specified number of bars. By setting your stop loss as a multiple of the current ATR (like 1.5x ATR), your protective stop automatically widens during volatile market bursts and tightens during quiet consolidation. This prevents noise from closing valid setups while ensuring you do not over-risk when ranges compress.
How this calculator functions:
The script queries the live ATR indicator value on your execution timeframe and multiplies it by your chosen risk multiplier. It then calculates the exact point distance and price level required for your buy or sell stop loss.
Key advantages include:
• Universal Support: Native functions formatted for both MQL4 and MQL5 codebases.
• Noise Immunity: Keeps scalp trades alive during spread fluctuations and volatility spikes.
• Seamless EA Integration: Easily embeds into custom execution scripts or automated risk managers.
Grab the code above, integrate it into your scalping workflow, and stop giving capital to market noise! Let me know your favorite ATR multipliers below.
MQL4
Why is an ATR-based stop essential for scalping? ATR measures true market volatility over a specified number of bars. By setting your stop loss as a multiple of the current ATR (like 1.5x ATR), your protective stop automatically widens during volatile market bursts and tightens during quiet consolidation. This prevents noise from closing valid setups while ensuring you do not over-risk when ranges compress.
How this calculator functions:
The script queries the live ATR indicator value on your execution timeframe and multiplies it by your chosen risk multiplier. It then calculates the exact point distance and price level required for your buy or sell stop loss.
Key advantages include:
• Universal Support: Native functions formatted for both MQL4 and MQL5 codebases.
• Noise Immunity: Keeps scalp trades alive during spread fluctuations and volatility spikes.
• Seamless EA Integration: Easily embeds into custom execution scripts or automated risk managers.
Grab the code above, integrate it into your scalping workflow, and stop giving capital to market noise! Let me know your favorite ATR multipliers below.
MQL4
MQL5://+------------------------------------------------------------------+
//| Function: CalculateATRStopLoss |
//| Outputs: exact stop loss price and point distance for scalping |
//+------------------------------------------------------------------+
void CalculateATRStopLoss(int orderType, int atrPeriod, double multiplier,
double &slPrice, int &slPoints)
{
// Retrieve ATR value from the previous closed bar (index 1 to avoid intrabar noise)
double atrValue = iATR(Symbol(), Period(), atrPeriod, 1);
// Calculate stop loss distance in points
slPoints = (int)MathRound((atrValue * multiplier) / Point);
// Refresh market rates to ensure current Ask/Bid
RefreshRates();
if(orderType == OP_BUY)
{
slPrice = Ask - (atrValue * multiplier);
slPrice = NormalizeDouble(slPrice, Digits);
}
else if(orderType == OP_SELL)
{
slPrice = Bid + (atrValue * multiplier);
slPrice = NormalizeDouble(slPrice, Digits);
}
}
//+------------------------------------------------------------------+
//| Example usage inside OnTick() or custom execution script |
//+------------------------------------------------------------------+
void OnTick()
{
double slPrice = 0.0;
int slPoints = 0;
// Example: Calculate 1.5x ATR(14) Stop Loss for a BUY position
CalculateATRStopLoss(OP_BUY, 14, 1.5, slPrice, slPoints);
Comment(StringFormat("Scalping ATR SL | SL Price: %.\%df | Distance: %d points",
Digits, slPrice, slPoints));
}
//--- Global variable to store indicator handle
int g_atrHandle = INVALID_HANDLE;
//+------------------------------------------------------------------+
//| Function: CalculateATRStopLoss |
//| Outputs: exact stop loss price and point distance for scalping |
//+------------------------------------------------------------------+
bool CalculateATRStopLoss(ENUM_ORDER_TYPE orderType, int atrPeriod, double multiplier,
double &slPrice, int &slPoints)
{
// Initialize ATR handle if invalid
if(g_atrHandle == INVALID_HANDLE)
{
g_atrHandle = iATR(_Symbol, _Period, atrPeriod);
if(g_atrHandle == INVALID_HANDLE) return false;
}
// Copy the latest closed bar ATR value (index 1)
double atrBuffer[];
ArraySetAsSeries(atrBuffer, true);
if(CopyBuffer(g_atrHandle, 0, 1, 1, atrBuffer) <= 0) return false;
double atrValue = atrBuffer[0];
double point = SymbolInfoDouble(_Symbol, SYMBOL_POINT);
int digits = (int)SymbolInfoInteger(_Symbol, SYMBOL_DIGITS);
// Calculate stop loss distance in points
slPoints = (int)MathRound((atrValue * multiplier) / point);
// Calculate exact price level based on order direction
if(orderType == ORDER_TYPE_BUY)
{
double ask = SymbolInfoDouble(_Symbol, SYMBOL_ASK);
slPrice = NormalizeDouble(ask - (atrValue * multiplier), digits);
}
else if(orderType == ORDER_TYPE_SELL)
{
double bid = SymbolInfoDouble(_Symbol, SYMBOL_BID);
slPrice = NormalizeDouble(bid + (atrValue * multiplier), digits);
}
return true;
}
//+------------------------------------------------------------------+
//| Example usage inside OnTick() |
//+------------------------------------------------------------------+
void OnTick()
{
double slPrice = 0.0;
int slPoints = 0;
// Example: Calculate 1.5x ATR(14) Stop Loss for a BUY position
if(CalculateATRStopLoss(ORDER_TYPE_BUY, 14, 1.5, slPrice, slPoints))
{
int digits = (int)SymbolInfoInteger(_Symbol, SYMBOL_DIGITS);
Comment(StringFormat("Scalping ATR SL | SL Price: %.\%df | Distance: %d points",
digits, slPrice, slPoints));
}
}