diff --git a/skills/gmgn-market/SKILL.md b/skills/gmgn-market/SKILL.md
index a29c0a8..6bf7718 100644
--- a/skills/gmgn-market/SKILL.md
+++ b/skills/gmgn-market/SKILL.md
@@ -507,7 +507,7 @@ All filter flags are sent as part of the API request body — the server filters
 | `--min-progress` / `--max-progress` | float | Bonding curve progress (0–1) |
 | `--min-marketcap` / `--max-marketcap` | float | Market cap (USD) |
 | `--min-liquidity` / `--max-liquidity` | float | Liquidity (USD) |
-| `--min-created` / `--max-created` | string | Token age (e.g. `1m` / `5m` / `1h` / `24h`) |
+| `--min-created` / `--max-created` | duration | Token age — unit suffix recommended: seconds (`30s`, `10s`) or minutes (`0.5m`, `1m`, `5m`, `30m`). Bare numbers (e.g. `5`) are treated as minutes with a warning. |
 | `--min-holder-count` / `--max-holder-count` | int | Holder count |
 | `--min-top-holder-rate` / `--max-top-holder-rate` | float | Top-10 holder concentration (0–1) |
 | `--min-rug-ratio` / `--max-rug-ratio` | float | Rug pull risk score (0–1) |
diff --git a/src/commands/market.ts b/src/commands/market.ts
index df7d7c5..7cede05 100644
--- a/src/commands/market.ts
+++ b/src/commands/market.ts
@@ -4,6 +4,22 @@ import { getConfig } from "../config.js";
 import { exitOnError, printResult } from "../output.js";
 import { validateAddress, validateChain } from "../validate.js";
 
+// Parse token age string. If a unit suffix is present (s/m), use it as-is.
+// Bare numbers (no unit) are treated as minutes with a warning.
+function parseDuration(value: string): string {
+  if (/^\d+(\.\d+)?[sm]$/.test(value)) return value;
+  if (/^\d+(\.\d+)?$/.test(value)) {
+    console.warn(
+      `[gmgn-cli] Warning: no unit specified for duration "${value}" — treating as minutes (${value}m). Use a suffix to be explicit: ${value}s for seconds or ${value}m for minutes.`
+    );
+    return `${value}m`;
+  }
+  console.error(
+    `[gmgn-cli] Invalid duration "${value}". Use seconds (e.g. 30s) or minutes (e.g. 0.5m / 1m / 5m).`
+  );
+  process.exit(1);
+}
+
 export function registerMarketCommands(program: Command): void {
   const market = program.command("market").description("Market data commands");
 
@@ -76,6 +92,8 @@ export function registerMarketCommands(program: Command): void {
       trenchesCmd.option(`--${flag} <${def.type}>`, def.desc, parseInt);
     } else if (def.type === "float") {
       trenchesCmd.option(`--${flag} <${def.type}>`, def.desc, parseFloat);
+    } else if (def.type === "duration") {
+      trenchesCmd.option(`--${flag} <duration>`, def.desc, parseDuration);
     } else {
       trenchesCmd.option(`--${flag} <value>`, def.desc);
     }
@@ -169,7 +187,7 @@ export function registerMarketCommands(program: Command): void {
 
 // ---- Trenches filter field definitions ----
 
-type TrenchesFieldType = "int" | "float" | "string";
+type TrenchesFieldType = "int" | "float" | "string" | "duration";
 
 interface TrenchesFilterField {
   api: string;
@@ -201,8 +219,8 @@ const TRENCHES_FILTER_FIELDS: TrenchesFilterField[] = [
   { api: "min_liquidity",     type: "float",  desc: "Min liquidity (USD)" },
   { api: "max_liquidity",     type: "float",  desc: "Max liquidity (USD)" },
   // Token age
-  { api: "min_created",       type: "string", desc: "Min token age (e.g. 1m / 5m / 30m / 1h / 6h / 24h)" },
-  { api: "max_created",       type: "string", desc: "Max token age (e.g. 1m / 5m / 30m / 1h / 6h / 24h)" },
+  { api: "min_created",       type: "duration", desc: "Min token age — unit recommended: seconds (e.g. 30s) or minutes (e.g. 0.5m / 1m / 5m / 30m). Bare numbers treated as minutes." },
+  { api: "max_created",       type: "duration", desc: "Max token age — unit recommended: seconds (e.g. 30s) or minutes (e.g. 0.5m / 1m / 5m / 30m). Bare numbers treated as minutes." },
   // Holders
   { api: "min_holder_count",  type: "int",    desc: "Min holder count" },
   { api: "max_holder_count",  type: "int",    desc: "Max holder count" },