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diff --git a/config.py b/config.py
index 0de3a18..e1ab7f3 100644
--- a/config.py
+++ b/config.py
@@ -1,4 +1,11 @@
-API_KEY = ''
-API_SECRET = ''
+import os
 
-dias = 7
\ No newline at end of file
+API_KEY = os.getenv("BINANCE_API_KEY", "")
+API_SECRET = os.getenv("BINANCE_API_SECRET", "")
+
+dias = 30
+workers = 6
+max_retries = 6
+retry_base_delay = 1.0
+request_timeout = 10
+show_progress = True
diff --git a/functions.py b/functions.py
index dde3439..199c7ed 100644
--- a/functions.py
+++ b/functions.py
@@ -1,59 +1,106 @@
+import random
+import time
+from concurrent.futures import ThreadPoolExecutor, as_completed
+
 import config
 from binance.client import Client
-import time
 
-dias = config.dias
-client = Client(config.API_KEY, config.API_SECRET, tld='com')
+# Configuración
+dias = int(getattr(config, 'dias', 30))
+workers = max(1, int(getattr(config, 'workers', 6)))
+max_retries = max(1, int(getattr(config, 'max_retries', 6)))
+retry_base_delay = float(getattr(config, 'retry_base_delay', 1.0))
+request_timeout = int(getattr(config, 'request_timeout', 10))
+show_progress = bool(getattr(config, 'show_progress', True))
 
-listTiks = []
+client = Client(
+    getattr(config, 'API_KEY', ''),
+    getattr(config, 'API_SECRET', ''),
+    tld='com',
+    requests_params={'timeout': request_timeout},
+)
 
 
-def buscarTicks():
-    ticks = []
+def _log_error(error):
+    with open('log.txt', 'a', encoding='utf-8') as archivo:
+        mensaje = time.strftime('%d-%m-%Y %H:%M:%S', time.localtime())
+        archivo.write(f"{mensaje} ERROR: {error}\n")
 
-    while True:
-        try:
-            list_of_tickers = client.futures_symbol_ticker()
-        except Exception as e:
-            print(e)
-            archivo = open("log.txt", "a")
-            mensaje = time.strftime('%d-%m-%Y %H:%M:%S', time.localtime()) + ' ERROR: ' + str(e) + "\n"
-            archivo.write(mensaje)
-            archivo.close()
-            time.sleep(2)
-        else:
-            break
-
-    for tick in list_of_tickers:
-        if tick['symbol'][-4:] != 'USDT':
-            continue
-        ticks.append(tick['symbol'])
-    return ticks
-
-def analizarMoneda(tick):
-    while True:
+
+def _with_retry(fn, *args, **kwargs):
+    for attempt in range(1, max_retries + 1):
         try:
-            klines = client.futures_klines(symbol=tick, interval=client.KLINE_INTERVAL_1DAY, limit=dias)
-        except Exception as e:
-            print(e)
-            archivo = open("log.txt", "a")
-            mensaje = time.strftime('%d-%m-%Y %H:%M:%S', time.localtime()) + ' ERROR: ' + str(e) + "\n"
-            archivo.write(mensaje)
-            archivo.close()
-            time.sleep(2)
-        else:
-            break
-
-    nKlines = len(klines)-1
-    oldClose = float(klines[0][4])
-    newClose = float(klines[nKlines][4])
-    porcentaje = round((newClose - oldClose)/oldClose*100, 2)
-
-    listTiks.append((tick, oldClose, newClose, porcentaje))
-    #print(listTiks)
-    #print("TICK: "+tick+" OLD:"+str(oldClose)+" NEW: "+str(newClose)+" PORCENTAJE: "+str(porcentaje)+"%")
-
-def showResults():
-    ordenar = sorted(listTiks, key=lambda result: result[3])
+            return fn(*args, **kwargs)
+        except Exception as error:
+            print(f"ERROR attempt {attempt}/{max_retries}: {error}")
+            _log_error(error)
+            if attempt == max_retries:
+                raise
+            backoff = min(retry_base_delay * (2 ** (attempt - 1)), 30.0)
+            time.sleep(backoff + random.uniform(0.0, 0.3))
+
+
+def buscarTicks():
+    list_of_tickers = _with_retry(client.futures_symbol_ticker)
+    return [tick['symbol'] for tick in list_of_tickers if tick['symbol'].endswith('USDT')]
+
+
+def _analizar_moneda(tick):
+    klines = _with_retry(
+        client.futures_klines,
+        symbol=tick,
+        interval=client.KLINE_INTERVAL_1DAY,
+        limit=dias,
+    )
+
+    if not klines or len(klines) < 2:
+        return None
+
+    old_close = float(klines[0][4])
+    new_close = float(klines[-1][4])
+    if old_close == 0:
+        return None
+
+    porcentaje = round((new_close - old_close) / old_close * 100, 2)
+    return (tick, old_close, new_close, porcentaje)
+
+
+def analizarMonedas(ticks):
+    resultados = []
+
+    if not ticks:
+        return resultados
+
+    if workers == 1:
+        for index, tick in enumerate(ticks, start=1):
+            try:
+                resultado = _analizar_moneda(tick)
+                if resultado is not None:
+                    resultados.append(resultado)
+            except Exception as error:
+                _log_error(error)
+            if show_progress and (index == len(ticks) or index % 25 == 0):
+                print(f"ANALIZADAS: {index}/{len(ticks)}")
+        return resultados
+
+    with ThreadPoolExecutor(max_workers=workers) as executor:
+        future_to_tick = {executor.submit(
+            _analizar_moneda, tick): tick for tick in ticks}
+        for index, future in enumerate(as_completed(future_to_tick), start=1):
+            try:
+                resultado = future.result()
+                if resultado is not None:
+                    resultados.append(resultado)
+            except Exception as error:
+                _log_error(error)
+            if show_progress and (index == len(ticks) or index % 25 == 0):
+                print(f"ANALIZADAS: {index}/{len(ticks)}")
+
+    return resultados
+
+
+def showResults(resultados=None):
+    datos = resultados or []
+    ordenar = sorted(datos, key=lambda result: result[3])
     for r in ordenar:
-        print("TICK: "+r[0]+" OLD:"+str(r[1])+" NEW: "+str(r[2])+" PORCENTAJE: "+str(r[3])+"%")
+        print(f"TICK: {r[0]} OLD:{r[1]} NEW:{r[2]} PORCENTAJE: {r[3]}%")
diff --git a/script.py b/script.py
index 253f49a..2cc11e6 100644
--- a/script.py
+++ b/script.py
@@ -1,9 +1,20 @@
-from functions import *
+import time
 
-ticks = buscarTicks()
-ticksNumber = len(ticks)
-print("NUMERO DE TICKS: " + str(ticksNumber))
+from functions import analizarMonedas, buscarTicks, dias, showResults
 
-for tick in ticks:
-    analizarMoneda(tick)
-showResults()
+
+def main():
+    inicio = time.perf_counter()
+    ticks = buscarTicks()
+    print(f"NUMERO DE TICKS: {len(ticks)}")
+    print(f"NUMERO DE DIAS A ESTIMAR: {dias}")
+
+    resultados = analizarMonedas(ticks)
+    showResults(resultados)
+
+    duracion = round(time.perf_counter() - inicio, 2)
+    print(f"TIEMPO TOTAL: {duracion}s")
+
+
+if __name__ == '__main__':
+    main()