iEXRates — BestChange rates under control

A system that keeps exchanger rates near the target position.

iEXRates collects BestChange offers, calculates final rates by your rules, tracks competitors, publishes TXT files, and shows the operator exactly why a rate was selected.

The module is designed for exchangers that need more than pulling a BestChange rate: position control, margin, commissions, cities, exclusions, formulas, and fast updates across many directions.

Price—

How it works

top-1, top-2, top-3 and selected competitors tags, fees, steps, rounding and preview one file per profile fast updates for large lists

100k+

directions can be handled through server pagination and batch updates

2 контура

BestChange and external sources separated inside one admin panel

24/7

live update state, incidents, logs and TXT freshness

iEXExchanger clients only

This project connects to an active iEXExchanger license and works as an additional module for the core platform.

Demo

Watch a short iEXRates product demo

The video shows admin workflows: profiles, directions, formulas, position control, TXT files, update analytics, and operator screens.

Open demo in Telegram

BestChange profilesformulas and feesexchanger trackingTXT publishing

Core idea

Not a rate table, but a BestChange market control center

The administrator configures a profile, directions, and rules. The system then updates dictionaries, checks available pairs, receives offers, applies formulas, protects the position, and prepares public files for the exchanger website.

Directions and cities

For cash directions the city becomes part of the pair and TXT code so rates do not mix across cities.

Offer filters

Reserve, limits, exchanger marks, blocklists, own exchanger and zero values can be accounted for.

Exchanger tracking

The system can follow a selected competitor and automatically stay above or below it.

Included

Main iEXRates capabilities

01 · Profiles

BestChange profile

A single place for language, rate type, interval, timeout, default position, own exchanger and TXT publishing settings.

Shared API URLs and mirrors with ping and priority

keys are stored in the database and managed from admin panel

each profile gets its own TXT file

02 · Directions

Pairs and bulk rules

Directions can be added one by one or in bulk, grouped, filtered, and updated by selected conditions.

direction groups are stored in the database

each tab loads its data separately

bulk actions work by server-side filters

03 · Calculation

Trace for every rate

Details show base offer, position, exchanger, formula, step, fee, limits and final value for output.

clear explanation of how a rate was produced

zero and invalid offers are excluded

history helps investigate rate changes

Formulas

Formulas as a standalone product inside the system

The formula editor shows available tags, explains every calculation step, and allows checking the result before saving. This is useful when a rate must account for several conditions at once.

Formula preview

[pos:3] + step_to_competitor - 0.15%

Position

Competitor

Exchanger

Result

0.06784261

Ready strategies

Best rate, exact position, position range, average of several places, own exchanger or competitor.

Manual formula

Tags are inserted from hints and preview shows the result before applying it to a direction.

Result limits

You can limit maximum jump, minimum reserve, position and behavior when data is missing.

Fees and adjustments

+1, -1, +1%, -1%, division, formula adjustments and separate rules for external sources are supported.

Tracking and fees

A rate can follow a selected exchanger, above it or below it

For every direction you can choose a target exchanger, above or below mode, minimum step, change limit, commission, and fallback if the target competitor disappears from the list.

rule example

TargetExchanger · #3

Actionstay above by step

Fee-0.15%

Selected exchanger tracking

A direction can target not only a position, but a specific exchanger from the BestChange list.

Stay above or below

You can keep the rate slightly above the selected competitor or safely below it.

Jump protection

Change limits and anti-jump rules prevent sudden moves from random offers or temporary market errors.

Fees and adjustments

A rate can use +1, -1, +1%, -1%, /5, /5%, or a custom formula to include margin and costs.

Condition filters

Rules can account for positions, reserve, limits, exchanger marks, city, and blocklists.

Explainable calculation

Trace shows the selected offer, applied step, commission point, and why the final value reached TXT.

Workflow example

How the owner configures a direction

Rules are configured once. iEXRates then receives the market, selects the correct offer, applies protection, and publishes the final rate.

Select pair

For example BTC to cash RUB, with Moscow as a required city.

Set target

Position #2, stay above a selected exchanger, or average top-10.

Apply rules

Filters, reserve, limits, blocklist, fee, rounding and jump protection.

Publish TXT

A ready code like BTC-CASHRUB_MSK is written to the profile file and available to the site.

Fast engine

Updates run as a pipeline, not one heavy request

The Go engine splits work into stages: dictionaries, direction checks, offer fetching, calculation, position guard, and file generation. This reduces latency and scales to thousands of pairs.

dictionary.sync

Dictionaries

Currencies, cities, exchangers and marks update on the server and are read locally.

presence.scan

Direction check

The system can first check which pairs actually exist to avoid unnecessary rate loading.

rates.fetch

Offer fetching

URL/key pool, limits, retries, snapshot cache and fallback help tolerate API instability.

rates.calculate

Rate calculation

Formulas, positions, fees, steps and limits produce one explainable final rate.

guard.apply

Position guard

Target position, competitor, minimum step and allowed change are checked.

txt.generate

File generation

TXT is rebuilt only on changes, keeping publication fast.

Operations center

Logs, incidents, and analytics show the cause, not just an error

If a rate did not update, the operator sees what happened: a BestChange mirror failed, a key hit a limit, a direction became stale, TXT was delayed, or a formula produced a forbidden result.

Update speed

Shows update duration, successful pairs, stale directions and per-second speed.

History and charts

You can inspect final rate, raw rate, position, spread between places and competitor behavior.

Incidents

A problem becomes a clear card: where it failed, what happened to the key, URL, direction and TXT.

Access control

Key login, permission groups, users and audit trail help the team work safely.

Analytics

You can see what updated, what is delayed, and why a rate changed

The operations center shows update speed, TXT freshness, queue health, API errors, calculation history, and direction quality.

Updated

1166

Speed

4 961/с

Success

100%

BTC → CASHRUB_MSK

position #2 · custom step · TXT ready

Live

Final rate

4 414 387.0458

Target

Exchanger · #2

Additional sources

BestChange remains the core, but rates can be extended with external sources

Binance, Bybit, WhiteBIT, Heleket, file, and manual rates can use separate profiles, own codes, fees, TXT files, and server-side pagination.

[binance_usdt-btc]