Forex Dynamic Lot Size Calculator

10月28日

Forex Dynamic Lot Size Calculator for Forex. Works on USD Base and USD Quote pairs. Provides real-time data based on stop-loss location. Allows you to know in real-time how the number of lots you need to purchase to match your risk %.

Number of Lots is calculated based on total risk. Total risk is calculated based on Stop-Loss + Commission + Spread Fees + Slippage measured in pips. Also includes data such as break-even pips, net take profit, margin required, buying power used, and a few others. All are real-time and anchored to the current price.

The intention of creating this indicator is to help with risk management. You know exactly how many lots you need to get this very moment to have your total risk at lets say $250, which includes commission fees, spread fees, and slippage.

To put it simply, if I was to enter the trade right now and willing to risk exactly $250, how many lots will I need to get right this second?

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- To use adjust Account Settings along with other variables.
- Stop Loss Mode can be Manual or Dynamic. If you select Dynamic, then you will have to adjust Stop Loss Level to where you can see the reference line on the screen. It is at 1.1 by default. Just enter current price and the line will appear. Adjust it by dragging it to where you want your stop loss to be.
- Take Profit Mode can also be Manual or Dynamic. I just keep my TP at Manual and use Quick Access to set Quick RR levels.
- Adjust Spreads and Slippage to your liking. I tried to have TV calculate current spread, but it seem like it doesn't have access to real-life data for me like MT5 does. I just use average instead. Both are optional, depending on your broker and type of account you use.
- Pip Value for the current pair, Return on Margin, and Break-even line can be turned on and off, based on your needs. I just get the Break-even value in pips from the pannel and use that as reference where I need to relocate my stop loss to break-ever (commission + spreds + slippage).
- Panel is fully customizable based on your liking. Important fields are highlighted along with reference lines.

10月29日

版本注释

Major Changes

1. Corrected Conceptual Model

Entry Slippage (affects your entry price)
- Time delay - Price moves between when you see it and click
- Spread - You pay bid/ask when entering
- Result: You enter X pips worse than intended → Your effective SL distance increases

Exit Slippage (affects your SL/TP execution)
- Time delay - SL order execution isn't instant
- Spread - You pay bid/ask when exiting
- Market volatility - Fast moves can cause requotes
- Result: You exit Y pips worse than your SL/TP level → Additional loss/reduced profit

2. Added Conservative Mode in addition to already existing Ideal Mode.

IDEAL Lot Size = Assumes perfect entry, but realistic exit (spread + slippage at exit)
CONSERVATIVE Lot Size = Realistic entry + realistic exit (accounts for entry slippage too)

The difference between Ideal and Conservative is:

Ideal: You get filled at your intended entry price, but exit has realistic slippage
Conservative: You get filled worse than intended (entry slippage), AND exit has slippage

3. TP now based on total risk pips (not just SL)

Lot Size based on: SL + Exit Slippage + Commission (in pips)
TP based on: (SL + Exit Slippage + Commission in pips) × RR

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- You can switch from Conservative to Ideal Mode depending on your preferences. I prefer Conservative Mode knowing well that I there will be execution slippage because of time and spreads.
- TP now is more realistic, which means that Position Tools is useless in calculating TP. Price Range tool is a better replacement.

10月30日

版本注释

Minor fixes to reference lines.

10月30日

版本注释

Major Changes

Converted existing script into a complete trading workflow system. TV doesn't allow renaming scripts, but I would now call it Forex Risk & Trade Manager rather than Forex Dynamic Lot Calculator.

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Trade Management Mode

Added Trade Management Mode that allows real-time tracking and monitoring of an active trade with actual fill prices and position sizes.

Enable by toggling "Enable Trade Management Mode" and entering:
- Actual Entry Price - Your real fill price
- Actual Lot Size - Position size you actually entered
- Trade Direction - Long or Short

What It Calculates?
- Real-Time P&L Tracking
- Risk Analysis (Based on Actual Trade)
- Take Profit Calculation
- Distance Metrics
- Break-Even

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Partial Exits System

Added Partial Exits System to the Trade Management Mod

Purpose: Split position closure across two price levels instead of single TP.

Key Parameters:

- exitPercent1: Percentage to close at Level 1 (default 80%)
- exitPercent2: Auto-calculated as 100 - exitPercent1 (default 20%)
- partialTP1Price: First exit price level
- partialTP2Price: Second exit price level

Calculation Logic:

1. Lot Allocation: Total lots split proportionally (e.g., 4 lots → 3.2 @ L1, 0.8 @ L2)
2. Pips Calculation: Distance from actual entry to each TP level
3. Fee Allocation: Total fees (commission + exit slippage) distributed proportionally to each exit
4. P&L per Level: (lots × pips × pipValue) - allocated fees
5. Total Profit: Sum of both levels' net P&L

Visual Indicators:

- TP1 line: Solid green (closer target)
- TP2 line: Dashed green (final target)
- Labels show: percentage, lots, pips, and net P&L for each level

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Risk Management Mode (Planning Mode)

Initial script has been converted to Risk Management Mode (Planning Mode) that allows pre-trade position sizing and risk calculation to determine optimal lot size before entering a trade. Its core function is to calculate the exact lot size needed to risk a specific percentage of your account, accounting for all costs (slippage, commissions, stop loss distance).

Two Calculation Approaches

1. IDEAL Mode

Assumption: Perfect entry execution, only exit slippage matters

Total Risk Pips = SL Pips + Exit Slippage
Lot Size = Risk Amount / (Total Pips × Pip Value + Commission)

2. CONSERVATIVE Mode (Recommended)

Assumption: Realistic entry with slippage + exit slippage

Effective SL = SL Pips + Entry Slippage
Total Risk Pips = Effective SL + Exit Slippage
Lot Size = Risk Amount / (Total Pips × Pip Value + Commission)

What It Calculates?
- Lot Size (Ideal or Conservative)
- Alternate Lot Size
- Stop Loss & Take Profit
- Risk Breakdown
- Profit Projections (if TP enabled)
- Margin Analysis

Slippage Modeling

Entry Slippage
- Total cost to enter position
- Includes: spread + execution delay + volatility
- Effect: Increases effective SL distance

Exit Slippage
- Total cost to exit position (SL or TP)
- Includes: spread + execution delay + volatility gap
- Effect: Adds cost to both SL and TP execution

Break-Even Calculation

Shows how far price must move in your favor just to recover fees:

Total Fees = Commission + Exit Slippage Cost
BE Pips = Total Fees / (Lot Size × Pip Value)

Take Profit Calculation Methods

1. Planning Mode (Risk Management)

A. Manual (RR) Mode - Default

Logic: TP is calculated as a multiple of total risk (not just SL distance)
Formula:

Total Risk Pips = SL Pips + Exit Slippage + Commission (in pips)
TP Pips = Total Risk Pips × RR Multiple

B. Dynamic (to Level) Mode

Logic: TP is set to a specific price level you choose


2. Trade Management Mode

Based on actual execution: Uses your actual entry price and lot size

Direct dollar calculation:
- Calculates total risk in dollars first
- Multiplies by RR to get gross TP in dollars
- Converts back to pips for display

No entry slippage consideration: Entry slippage is irrelevant - you're already in the trade!
Cleaner logic: "If I'm risking $100, my TP should net me $200 for 2:1 RR"

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Key Features of Forex Risk & Trade Manager

Stage 1: Pre-Trade Planning
- Sophisticated lot size calculator
- Dual calculation methodology (Ideal vs Conservative)
- Real-world slippage modeling
- True risk-reward calculations
- Margin requirement analysis
- Break-even analysis

Stage 2: Trade Execution
- Visual entry/exit price levels
- Risk visualization on chart
- Final pre-trade checklist

Stage 3: Active Trade Management
- Real-time P&L tracking
- Distance metrics to key levels
- Live risk exposure monitoring
- Unrealized profit/loss projections
- Break-even tracking

Quick Access

Quick RR dropdown for common ratios:
- 1.0, 1.25, 1.5, 1.75, 2.0, 2.25, 2.5, 2.75, 3.0
- Or "Custom" for manual input

Full Customization
- Panel colors (background, header, text)
- Line colors (SL, TP, BE, Entry)
- Text colors (lot size, risk, profit)
- Table transparency & borders
- Section dividers

Auto Pip Detection
- JPY pairs: 0.01 pip size
- Standard pairs: 0.0001 pip size
- Manual override available

Auto Pip Value Calculation

11月1日

版本注释

- Revised Partial Exits logic.
- 3 Levels in total can be used.
- Partial Exit Method can be either set Manual Levels or RR Multiples.
- Level 1: Exit `X%` of position to NET true 1:1 RR
- True Risk = $1000
- Exit % at Level 1: 80%
- Level 1 RR Multiple: 1
- (80% × distance) = $1000 (True Risk)
- Level 2: Exit remaining 20% to achieve overall 1.5:1 RR
- Total target: $1500
- Already made: $1000
- Need from 20%: $500
- Manual Levels are dynamic and can be relocated by dragging reference lines. Price level needs to be set for them to appear on the screen.
- Side panel and labels tell you exact amount of lots that needs to be sold/bought at each level. Makes it easy to set Limit Orders.
- Fixed running P/L in Standard TP Mode after price reached the target.
- Revised panel for ease of navigation.
- Trade Management - For active trades
- Stop Loss - Most-used section
- Take Profit - Second most-used section
- Partial Exits - When using partial exit strategy
- Account Settings - Set once, rarely changed
- Entry & Exit Slippage - Set once, rarely changed
- Display - Visual preferences
- Panel Colors - Styling options
- Table Text Colors - More styling
- Reference Lines - Line styling