Eliminate the hassle of supporting. The first choice we made was this single product

Introduction

Last time, I talked about why I started a place called the Indicator Institute. From this time, we will trace the development records of the “usable tools” that the institute has actually brought to life, one by one.

First, I want to tell you about the very first release we made: “Support/Resistance automatic drawing + touch notification + LINE notification.”

Why we made this the very first

When we were capable of creating multiple tools, deciding where to start is surprisingly tricky. There were two main reasons we chose this as the first.

One is that we could directly leverage in-house technical assets. The ideas of automatic horizontal line drawing and notifications to LINE were ideas we had been nurturing elsewhere. Rather than building from scratch, we decided it would be faster and more reliable to consolidate these assets into a single tool first.

The other reason is that the regulatory risk was lower. A tool that directly places orders would require careful handling of regulatory boundaries, but this tool was designed to focus on “display” and “notification,” allowing us to avoid those gray areas.

“Deliver the fastest first product with low risk.” This is why we started with the Support/Resistance automatic drawing.

What problems we tackled

Support/Resistance lines are basic lines used by many discretionary traders in daily analysis. However, in actual usage, the following hassles tend to arise.

• Every time you open a chart, you redraw the support/resistance lines by hand
• The “line automatic drawing” and the “LINE notification” exist as separate tools, making management fragmented
• While the market is moving, you can’t stay glued to the chart, so you miss when prices approach the lines

We designed this into a single tool to address these pains and not let them go. This is the indicator we created for that purpose.

Unforeseen pitfalls found during development

During development, there was one major revision. Initially, the LINE notification feature was built using a system called “LINE Notify,” but LINE Notify was a service that ended at the end of March 2025. If we had released as is, the flagship notification feature would not work at all.

When I realized this, we rebuilt it to the successor system “LINE Messaging API.” From this experience, we established a rule in our company: when creating features that rely on external services, be sure to check the current status before and after starting.

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Next Preview

Next time, I will talk about the fine details we focused on during development, such as the “break proximity alert” and the “quiet hours” that are built into this tool.